Given :
A large pizza with no toppings costs $14.00. A large pizza with toppings costs $17.50 .
To Find :
The cost in dollars y, of a large pizza with x toppings from Pat's Pizzeria.
Solution :
Let, equation is :
y = mx + c ....1)
Case 1 : With no toppings.
y = 14 = m(0) + c
c = 14
Case 2 : With 1 toppings i.e x = 1 .
y = 17.50 = m( 1 ) + c
17.50 = m + 14
m = 3.5
Putting value of c and m in equation 1, we get :
y = 3.5x + 14
Hence, this is the required solution.