A linear equation can be represented by:Â
y = mx + bÂ
Where m = slope, and b = y intercept.Â
The slope is a rate of change, so our slope is $150.Â
The y intercept is the point where the equation crosses the y axis, or the "initial amount" in this case $500.Â
So our equation will be:Â
y = 150x + 500.Â