A ball thrown vertically upward at a speed of v ft/sec rises a distance d feet in t, given by `d=6+vt-16t^{2}.` Write an equation whose solution is: a. The time it takes a ball thrown at a speed of 88 ft/sec to rise 20 feet.

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )