Question

Wich function is used to find y,the remaining balance after x number of payments have been made?

Answer 1

The slope of a line that passes through points (x1, y1) and (x2, y2) is computed as follows:

`m=(y_2-y_1)/(x_2-x_1)`

The line of the picture passes through (0, 20000) and (40, 0) then its slope is:

`m=(0-20000)/(40-0)=-500`

The y-intercept of the line is (0, 20000)

Slope-intercept form of a line:

y = mx + b

where m is the slope and b is the y-coordinate of the y-intercept. Replacing with m = -500 and b = 20000, we get:

y = -500x + 20000