Question

Brenna charges $15, $30, $45, and $60 for babystting 1,2,3, and 4 hours, respctively. Is the relastionship between the amount charge and the number of hours porportional? If so, find the unit rate. If not explain why

Answer 1

Answer:

Yes, the relationship between the amount charge and the number of hours is proportional.

The unit rate is: $ 15 per hour.

Step-by-step explanation:

Two variables x and y are said to be in direct proportion if:

             $y=kx$

or

$\dfrac{y}{x}=k$

Here x represents the number of hours of baby sitting

and y represents the charges.

$\dfrac{15}{1}=15\\\\\dfrac{30}{2}=15\\\\\dfrac{45}{3}=15\\\\\dfrac{60}{4}=15$

Since, the ratio is constant.

Hence, the amount charge and the number of hours is proportional.

Also, the unit rate is: $ 15 per hour.

Answer 2

She charges $15 extra for each hour increased.

15+15=30 ,30+15=45, 45+15=60.

$15 is the unit rate.