A rocket is launched from earth and follows the equation y = -32x2+640x. Use completing the square to get this equation into vertex form. Answer the following questions: What was the starting height of the rocket? How high did the rocket go? When did the rocket reach its maximum height? When did the rocket hit the ground?

its 8

step-by-step explanation:

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y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4