The triangles below are similar. If the perimeter of triangle A is 52 feet and the perimeter of triangle A is 52 feet and the perimeter of triangle B is 13 feet, find the ratio of the area of triangle A to B

at first year 5000 compact discs were sold.

and it increased at a rate of 15000 per year in the upcoming year .

we need to linear function which mean if we graph it will get a straight line.

which is in the form of y=mx+b

where y=f(t) which means functions represented in time.

where 15000 is the slope of the equation which is increasing at this rate.

and b is the y intercept which mean from 5000 sales has been increased.

so the linear equation is