If you need a 1,300 square foot rental house painted, how much should the painter charge you to paint that house?

The painter should charge you $3,250 to paint that house.

Missing info:

A painter charges by the square foot and charges you $1,875 to paint a 750 square foot rental house.

y = kx

y = total payment to painter

x = number of square foot painted

k = unit price of 1 square foot painted

Given: y = 1875; x = 750; k = ?

k = y / x ⇒ k = 1875/750 ⇒ k = 2.50 per sq. ft

y = ?; x = 1300; k = 2.5

y = kx

y = 2.5 * 1300

y = 3,250