The table shows the cost to have various numbers of pizzas delivered from papas slice of italy pizzeria. is the relationship between the cost and the number of pizzas proportional? explain.

 No

Step-by-step explanation:

We know that the equation for direct proportion between two quantities x ( independent variable) and y (dependent variable) is given by :-

, where k is the proportionality constant.

if the relationship between the cost (dependent variable ) and the number of pizzas (independent variable ) is proportional, then k in the above equation remains constant for each row.

Let

1)

2)  

But 10≠12.50, thus the value for k is not fixed.

Hence, the relationship between the cost and the number of pizzas is not proportional.

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of