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If a parabola has x-intercepts at 13 and -21, what is the x-coordinate of its vertex

User Sai Z
by
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1 Answer

2 votes

Answer:

-4

Explanation:

To find the x-coordinate of the vertex of a parabola given its x-intercepts, find the average of the x-intercepts:

x-coordinate of the vertex =
(x_1+x_2)/(2) (where
x_1 and
x_2 are the x-intercepts)

Plug in the x-intercepts 13 and -21


(13+(-21))/(2)\\= (13-21)/(2)\\= (-8)/(2)\\=-4

Therefore, the x-coordinate of the vertex is -4.

I hope this helps!

User Bonkles
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