Answer:
C
Explanation:
From the equation y=2x+8, we can assume that y equals the total cost and that 8 equals the base price of a cheese pizza. The problem also tells us that x is the number of toppings and 2 is the number modifying that variable (remember that 2 is also the slope). So 2 must be the cost of each topping because it is being multiplied by the number of toppings. So 1 topping would be 2*1, an extra 2 dollars, and 4 toppings would be 2*4, so an extra 8 dollars for toppings.