How high a trick bike can jump is related linearly to the weight of the bike. If the bike weighs 20 pounds, it can jump 10.2 feet.

Question

How high a trick bike can jump is related linearly to the weight of the bike. If the bike weighs 20 pounds, it can jump 10.2 feet. A bike of 40 pounds can make a jump of 6.2 feet.  

Which equation represents the height (h) of the jump with respect to the weight of the bike (w)?

My answer: h= -0.2w +10.2

Answer 1

m = 4/-20 = -0.2

h - 10.2 = -0.2(w - 20)

h - 10.2 = -0.2w + 4

h = -0.2w + 14.2

h - 6.2 = -0.2(w - 40)

h - 6.2 = -0.2w + 8

h = -0.2w + 14.2