Given:
We get the points (0,30), (1,31),(2,32), and (3,33) from the table.
Required:
We need to find the total cost.
Step-by-step explanation:
From the point(0,30).
There is an initial cost of $30 for print.
Let s be the number of sets of prints ordered.
Let k be the additional cost for each number of sets of print
The equation of the given model is

Consider the point (1,31).
Substitute total cost =31 and s=1 in the equation.


Subtract 30 from both sides.


Substitute k =1 in the equation.

Consider the point (2,32).
Substitute total cost =32 and s =2 in the equation.

It is true, so the equation satisfies the values in the table,
Final answer:
