A roofer measures a run of 4 feet for each 2 feet of rise on a roof. what is the pitch, or slope, of the roof
1 answer:
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I find it simplest to convert to standard form, find the perpendicular, convert back.
For standard form we move the x term to the left side:
The perpendiculars are given by swapping the x and y coefficients, negating one. The right side is directly determined by the point (-2,7):
Solve for y for point slope form:
That's the answer.