Hi there!
Let the amount of hours Kim worked be represented by X.
Her total earnings on a Friday night can be expressed as $30 + ($1.25 × the amount of hours). We can now set up a function for her total revenue (represented by Y).
[tex]y = 30 + 1.25x[/tex]
When Kim works 3 hours we need to plug in x = 3 into the formula.
[tex]y = 30 + 1.25 \times 3 = 30 + 3.75 = 33.75[/tex]
Therefore, after 3 hours of working, Kim would have made $33.75
