Question

Steven earns extra money babysitting. He charges $37.50 for 6 hours and $50.00 for 8 hours.

Answer 1

We have that
x------------------> represent the number of hours Steven babysits
y----------------- > represent the amount he charges

for x=6 hours
y=$37.50 ----------------> y/x=37.5/6=6.25
for x=8 hours
y=$50---------------------> y/x=50/8=6.25

therefore
y=6.25x

the answer is 
y=6.25x