HELP , aim trying to figure this out but still not knowing how to do the equation

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?