The table below shows Cameron's earnings on the job. Time (hours) Earnings (dollars)
4.
$136.40
16
$545.60
21
$716.10
What is the constant of proportionality between earnings
and time in hours?

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for