Question

Solve this put it in an equation and show your work

Answer 1

`y = -(5)/(2)x +30`

Situation: You start out with $30 and spend $2.50 every day on a soda.

Explanation:

The equation of a line is y = mx + b

b = y-intercept

m = slope, rise/run

The line crosses the y axis at 30, so b is 30

Now for the slope, rise/run.

Start at 30 on the y-axis and go down to 25, that is a rise of -5. Now you are at (0, 25) on x-axis. Move right to the point (2, 25). The run is 2.

m = -5/2

The equation of the line is y = -5/2x + 30