# The cost of printing the school newspaper is $500 for 800 copies and $620 for 1200 copies. If the printing cost is a linear function of the copies printed, how do you find the cost of printing 1500 copies?

##### 1 Answer

Apr 27, 2017

**Cost of printing** **copies is**

#### Explanation:

This is a linear function, i.e obeys straight line equation:

Let y denotes cost in

Slope

Equation of straight line is

Equation of straight line is

Check:

Cost of printing