A towing company charges $40 to hook a car and $1.70 for each mile that is towed. Write an equation that represents the total cost y for x miles towed. Find the y-intercept and interpret
its meaning in the context of the situation.

Given:

Fixed charges = $40

Variable charges = $1.70 for each mile.

To find:

The equation that represents the total cost y for x miles towed.

Find the y-intercept and interpret  its meaning in the context of the situation.

Solution:

Let y be the total cost for x miles.

Fixed charges = $40

Variable charges for 1 mile = $1.70

Variable charges for x mile = $1.70x

Now,

Total changes = Fixed charges + Variable changes

Therefore, the required equation is .

Putting x=0 in the above equation, we get

Therefore, the y-intercept is 40. It means the charges to hook a car is $40 if it is towed 0 miles.

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