Question

A house was purchased for $140,000. Three years later, the value of the house was $155,000. If the value V of the house increased linearly from the date it was purchased, which of the following represents the value, in dollars, of the house t years after the date it was purchased?

A. V=140,000 + 15,000t
B. V=140,000 + 5,000t
C. V=140,000 + 15,000(t-3)
D. V=140,000 + 5,000(t-3)

Answer 1

All your choices resemble the slope-yintercept form of a linear equation in the
form
y = mx + b, or V = b + mt if you wish.
you are just given two points, (0,140000) and (3,155000)
the slope would be 155000-140000)/3 = 5000
So which equation shows a slope of 5000 and a V intercept of 140,000 ?

Answer 2

155 - 140 = 15
so
m = 15,000 in y = m x + b
V = 15,000 t + 140,000

Answer 3

sorry m = 15/3 = 5

Answer 4

Its B