How should she write a point slope equation to represent her parking cost after a given number of days?

ANSWER

The equation is

.

EXPLANATION

The point-slope form the equation of a straight line is given by the formula,

.

where is the slope and is any point on the line.

We were given that the rate of change for the situation is .

Since the rate represents the slope, .

We were again told that at day 6 of the month, she spent $.

This implies that . Note that the cost depends on the number of days. Hence the number of days is the independent variable.

We can now substitute in to the formula to obtain,

(-5,-28)

i graphed to on desmos.

step-by-step explanation:

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