What is the minimum value of the function y=x^2+8x+7

So first you would use the formula - b / 2a to find the x coordinate and then plug in the x coordinate in to x to find the y coordinate.

-8 / 2 = - 4

y = (-4) ^2 + 8 * - 4 + 7

y = 16 + - 32 + 7

y = - 9

minimum value = - 9

it is the y of the coordinate because value is the number the whole equation equals.