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How do you find the coordinates for the parabola given by the equation 3xsquared-x-1?
Wiki User
∙ 14y ago
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Elwin Williamson
Wiki User
∙ 14y agoThe equation for a parabola is y = 3x2 - x - 1
To find the coordinates, replace x with a number from a select range say -5 to +5 and determine the corresponding value for y.
When x = -5 : y = 75 +5 - 1 = 79
x = -4 : y = 48 + 4 - 1 = 51
x = -3 : y = 27 + 3 - 1 = 29
x = -2 : y = 12 + 2 - 1 = 13
x = -1 : y = 3 + 1 - 1 = 3
x = 0 : y = -1
x = 1 : y = 3 - 1 - 1 = 1
x = 2 : y = 12 - 2 + 1 = 11
x = 3 : y = 27 - 3 - 1 = 23
x = 4 : y = 48 - 4 - 1 = 43
x = 5 : y = 75 - 5 - 1 = 69
Plot the x, y coordinates and join the points with a smooth curve.
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What is the parabola y equals -x2-3x plus 2?
It is the parabola such that the coordinates of each point on it satisfies the given equation.
What is the equation of the directrix of the parabola?
The answer depends on the form in which the equation of the parabola is given. For y^2 = 4ax the directrix is x = -2a.
The number of normals to the parabola from a point which lies outside?
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Given the standard equation for a parabola opening left or right which way does a parabola open when the coefficient of the y2-term a is positive?
right
Given the standard equation for a parabola opening up or down which way does a parabola open when the coefficient of the x2term a is negative Up or down?
down
What is the parabola y equals -x2-3x plus 2?
It is the parabola such that the coordinates of each point on it satisfies the given equation.
What is the y-coordinate of the vertex of the parabola that is given by the equation below?
We will be able to identify the answer if we have the equation. We can only check on the coordinates from the given vertex.
What is the equation of the directrix of the parabola?
The answer depends on the form in which the equation of the parabola is given. For y^2 = 4ax the directrix is x = -2a.
I'm trying to find certain coordinates on a parabola you know the start end and vertex coordinates and need to know the coordinates of a point when given a certain percentage Any ideas?
Use the equation: (Y-k)^2 = 4a(X-h)
The equation y -3x2 describes a parabola. Which way does the parabola open?
The given terms can't be an equation without an equality sign but a negative parabola opens down wards whereas a positive parabola opens up wards.
The number of normals to the parabola from a point which lies outside?
We can draw 3 normals to a parabola from a given point as the equation of normal in parametric form is a cubic equation.
Given the standard equation for a parabola opening left or right which way does a parabola open when the coefficient of the y2-term a is positive?
right
Given the standard equation for a parabola opening up or down which way does a parabola open when the coefficient of the x2term a is negative Up or down?
down
What is the x coordinate of the vertex parabola defined by the following function 3x plus x plus 7x plus 4?
The given equation is not that of a parabola.
Given the standard equation for a parabola opening left or right which way does a parabola open when the coefficient of the y2-term a is positive Left or right?
left
What is the answers for 7x2 plus 7x - 14?
There is no answer since what is given is an expression, not an equation. The expression is that of a parabola.
How do you find the equation of a parabola in standard form given 3 points?
I suggest that the simplest way is as follows:Assume the equation is of the form y = ax2 + bx + c.Substitute the coordinates of the three points to obtain three equations in a, b and c.Solve these three equations to find the values of a, b and c.
