Question

The table below shows the cost of different numbers of goldfish at a pet store.

​
COST OF GOLDFISH
​Number of Goldfish Cost​
​ 5 ​ $1.50
​ 10 ​ $3.00
​ 15 ​ ​ $4.50
​ 20 ​ ​ $6.00

​​The cost of the number of goldfish is a linear function. Which statement describes the rate of change of this function?​​

A - The cost increases $0.30 each time 1 goldfish is added.
B - The cost increases $1.50 each time 1 goldfish is added.
C - The cost increases $3.00 each time 5 goldfish are added.
D - The cost increases $6.00 each time 5 goldfish are added.

Answer 1

The answer is It’s the second one

Answer 2

The answer is B

Explanation:

The answer is B because when you add $1.50+$1.50, that equals $3.00. Then once you add $3.00 plus $1.50, that equals $4.00. And you just keep going.