Question

I need help solving problem 3

Answer 1

In 1990, y = 0 (no years have passed since 1990, of course)
This point can be described as (123000, 0).

In 2003, y = 13. The point is (197500, 13)

Now we just need to find the equation of a line between those two points.

We already know the y-intercept, that's 123000.

Calculate the slope...
`m=(y_2-y_1)/(x_2-x_1)=(197500-123000)/(13-0)=(74500)/(13)(simplified)`

Now, just write out your equation in slope-intercept form.