Chris and sam earn money shoveling snow, as described below.

. the amount of money chris earns can be modeled by the equation y=8.25x, where y is the total amount.

. the table below shows the relationship between the total amount of money earned, y, in dollars, and the total amount of time worked, x, in hours, for sam.

sam's earnings
x 4 6 8
y 30 45 60

which statement correctly compares the rates at which chris and sam earn money shoveling snow ?