A luxury car rental company charges $150 per day in addition to a flat fee of $50 for insurance.

Write an equation that represents the cost, f(x), (in dollars) to rent the car for x days. This equation should be in slope-intercept form.

y = total cost

You start at a cost of $50 at zero days, so $50 is your y-intercept (b).
Your rate of daily rental is your slope (m), and it goes up at $150 / 1 day.

Therefore, for y=mx+b, you would write
y = $150x + $50, where x>or = 0

y = $150x + $50,

To write an equation in slope-intercept form, we need to represent the cost, f(x), as a function of the number of days, x.

Given that the luxury car rental company charges a flat fee of $50 for insurance and $150 per day, we can express the cost as follows:

f(x) = 150x + 50

In this equation, x represents the number of days, 150x represents the cost for the rental days, and 50 represents the flat fee for insurance.

Therefore, the equation in slope-intercept form to represent the cost, f(x), in dollars to rent the car for x days is f(x) = 150x + 50.