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Can you solve for a b and c in the quadratic equation with only a list of data points?
Wiki User
∙ 15y ago
Yes. You need at least three points with x and y coordinates for this.
Let the points be: A(x1, y1), B(x2, y2) and C(x3, y3).
For each of the points yi = ax2i + bxi + c,
so you have to solve a set of simultaneous equations for i=1 ... 3(the y's and x's are no longer variables! the a, b, c are!):
y1 = ax21 + bx1 + c,
y2 = ax22 + bx2 + c,
y3 = ax23 + bx3 + c
Wiki User
∙ 15y ago
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How does a quadratic model differ from linear model?
LinearIn a linear model, the plotted data follows a straight line. Every data point may not fall on the line, but a line best approximates the overall shape of the data. You can describe every linear model with an equation of the following form:y = mx + bIn this equation, the letter "m" describes the angle, or "slope," of the line. The "x" describes any chosen value on the horizontal axis, while the "y" describes the number on the vertical axis that corresponds to the chosen "x" value.QuadraticIn a quadratic model, the data best fits a different type of curve that mathematicians call quadratic. Quadratic models have a curved shape that resembles the letter "u." You can describe all quadratic models with an equation of the form:Y = ax^2 + bx + cAs with linear models, the "x" corresponds to a chosen value on the horizontal axis and "y" gives the correlating value on the vertical axis. The letters "a," "b" and "c" represent any number, i.e., they will vary from equation to equation
Why can't you use two data points to write the equation of a line?
Actually, two separate points are enough to determine the line.
In order to solve an Inch Pound Equation you must use information provided on a truck's data plate.?
true
How do you find the equation for the line of best fit?
There are many ways, but probably you aren't in a statistics class, but in an algebra class. Step 1 plot all the data points on a coordinate plane graph (x-y graph) Step 2 estimate a line 'close' to points. Step 3 use 2 points ON THE LINE (these do not need to be data points) Step 4 find slope of line using points from step 3 Step 5 use point-slope formula to write the equation.
What is the sum of all the data points divided by the number of data points?
the average
In order to solve an Inch Pound Equation you must use information provided on a truck's data plate?
In order to solve an "Inch Pound Equation", you must use information provided on a truck's data plate.
What are data series?
A data series is a collection of data, most likely numbers, that you would use to graph or solve an equation.
A set of data points has an equation of equals -1.5 plus 2.5x?
-1.5
How does a quadratic model differ from linear model?
LinearIn a linear model, the plotted data follows a straight line. Every data point may not fall on the line, but a line best approximates the overall shape of the data. You can describe every linear model with an equation of the following form:y = mx + bIn this equation, the letter "m" describes the angle, or "slope," of the line. The "x" describes any chosen value on the horizontal axis, while the "y" describes the number on the vertical axis that corresponds to the chosen "x" value.QuadraticIn a quadratic model, the data best fits a different type of curve that mathematicians call quadratic. Quadratic models have a curved shape that resembles the letter "u." You can describe all quadratic models with an equation of the form:Y = ax^2 + bx + cAs with linear models, the "x" corresponds to a chosen value on the horizontal axis and "y" gives the correlating value on the vertical axis. The letters "a," "b" and "c" represent any number, i.e., they will vary from equation to equation
How do engineers use the quandratic formula?
Law of motion is quadratic equation and is use in calculate of object trajectory. Fluid dynamic for sizing of pump is also second order equation. Quadratic equation or higher may use to fit equation for fast calculation of result. Example on vapour density equation for the use of evaporative mass transfer. We do need to know how much water air can take. It could use the data from table but the work will be lengthly. We can make data in the table a form of polynomial equation and so put it into program for calculated out this require vapour density.
What does it mean to plot data points?
If you had a formula you would plug numbers in for the variables and solve for the other variables create a list of coordinates (data points). Next you would graph those points and connect the dots.
Why can't you use two data points to write the equation of a line?
Actually, two separate points are enough to determine the line.
In order to solve an Inch Pound Equation you must use information provided on a truck's data plate.?
true
Why is a graph more informative than an equation?
A graph is more informative than an equation because a graph is easier to interpret visually, and find all the points and line them up, rather than just a slope which shows no points(data).
How do you solve range?
The range of a set of data points is merely subtracting the lowest number from the highest number given in that set. For example, a data set that contains the points 4 ,7, 9, 20, 6, and 11, has the range of 20 - 4, or 16.
What is a sentence using the word graph?
The graph showed the results from his experiment. You can graph the data points to see what type of curve your equation defines.
How do you find the equation for the line of best fit?
There are many ways, but probably you aren't in a statistics class, but in an algebra class. Step 1 plot all the data points on a coordinate plane graph (x-y graph) Step 2 estimate a line 'close' to points. Step 3 use 2 points ON THE LINE (these do not need to be data points) Step 4 find slope of line using points from step 3 Step 5 use point-slope formula to write the equation.
