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I'm assuming you're talking about the equation for a graph here.
If you think about the axes on the graph, the y-axis occurs at x = 0, and the x-axis at y = 0. So, to find out where the line crosses the y-axis (or y-intercept), simply set x = 0 in the equation. Example:
y = 3x+7
when x = 0, y = 3 x 0 + 7, so y = 7
therefore the y-intercept is 7
To find the x-intercept, simply set y = 0 in the equation. This can be more difficult, especially if it has more than x cubed in it (there are formulae that can be used to solve polynomials, but they can get complicated). Examples:
y = 3x+7
when y = 0, 0 = 3x+7, so 3x = -7, and thus x = -7/3
therefore the x-intercept is -7/3
y = x^2+6x+8
when y = 0, x^2+6x+8 = 0, therefore x = -2 or -4
therefore the x-intercepts are -2 and -4
y = x^3+9x^2+30x+24
when y = 0, x^3+9x^2+30x+24 = 0, therefore x = -2, -3 or -4
therefore the x-intercepts are -2, -3 and -4
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∙ 13y ago
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It depends on the vertex of what!
How do you find how many x intercepts the parabola has using the discriminant?
If the discriminant is negative, there are 0 interceptsIf the discriminant is zero, there is 1 interceptIf the discriminant is positive, there are 2 intercepts
How do you find slope using x and y intercepts?
Your x and y intercepts give you two points on the line of the graph. Use these two points in the slope equation m = (y2-y1)/(x2-x1), and that gives you the slope.
What does it mean to solve a polynomial?
Find values of the variable for which the value of the polynomial is zero.
Find the slope and intercepts of each line y equals -x plus 1000?
Slope: -1 intercepts: (0,1000),(1000,0)
Is the number of y-intercepts for a polynomial determined by the degree of the polynomial?
no...
Is the x-intercepts the same thing as zeros?
Yes, the places where the graph of a polynomial intercepts the x-axis are zeros. The value of y at those places must be 0 for the polynomial to intersect the x axis.
What is the minimum number of x-intercepts that a 7th degree polynomial might have?
1
How do you determine the x-intercepts of the polynomial function?
set the values of the y equal to zero
How do you find the x intercepts using the vertex and y intercept?
It depends on the vertex of what!
What are the values at which the graph of a polynomial crosses the x-axis?
The graph of a polynomial in X crosses the X-axis at x-intercepts known as the roots of the polynomial, the values of x that solve the equation.(polynomial in X) = 0 or otherwise y=0
How do you find how many x intercepts the parabola has using the discriminant?
If the discriminant is negative, there are 0 interceptsIf the discriminant is zero, there is 1 interceptIf the discriminant is positive, there are 2 intercepts
Evaluate the polynomial expression using linked list using c?
Evaluating a Polynomial expression using a singly linked list visit : http://myfundatimemachine.blogspot.in/2012/06/polynomial-evaluation-in-c.html
How would you use intercepts to find the vertex in a quadratic equation with two x intercepts?
The vertex must be half way between the two x intercepts
How do you find slope using x and y intercepts?
Your x and y intercepts give you two points on the line of the graph. Use these two points in the slope equation m = (y2-y1)/(x2-x1), and that gives you the slope.
What is y equals -x using intercepts?
y = -xBoth intercepts are at the origin. From there, the line slopes up to the leftand down to the right.
How many x-intercepts does a quartic polynomial function having 4 distinct real roots have?
Each distinct real root is an x-intercept. So the answer is 4.
