Teresa will rent a car for the weekend. She can choose one of two plans . The first plan has the initial fee of $65 and cost an additional $.70 per mile driven. The second plan has no initial fee but will cost $.80 per mile driven. How many miles were to resend need to drive for the two plants to cost the same.

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step-by-step explanation:

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

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