Question

The amount that Susan charges per hour for babysitting is directly proportional to the number of children she is watching. She charges $4.50 for 3 kids. How much would she charge to babysit 5 kids?

Answer 1

$7.50 for 5 kids you divide 4.50 by 3 and get 1.50 and you take 1.50 times 5 and get 7.50

Answer 2

Answer: $7.5

Step-by-step explanation:

When two quantities x and y are directly proportional , then the equation that represents the direct proportion is given  y :-

$\dfrac{x_1}{y_1}=\dfrac{x_2}{y_2}$      (1)

Given : The amount that Susan charges per hour for babysitting is directly proportional to the number of children she is watching. She charges $4.50 for 3 kids.  

Let she charges x amount  to babysit 5 kids, then we have following equation:-

$\dfrac{x}{5}=\dfrac{4.50}{3}\\\\\Rightarrow\ \dfrac{4.50}{3}\times5=7.5$

Hence, she would charge $ 7.5  to babysit 5 kids.