Babysitting

The amount that Susan charges per hour for babysitting are 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?

Result

x =  7.5 USD

Solution:

$x=4.50 \cdot \ \dfrac{ 5 }{ 3 }=\dfrac{ 15 }{ 2 }=7.5 \ \text{USD}$

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