I’m very confused on all of this can someone please explain step by step in one of the questions??

A. -29

Step-by-step explanation:

g(x) is basically Y in a regular y=mx+b

g(10) bascially means substituting x with 10. So solve for x when x equals 10. g(10)=-3(10)+1 so g(10)=-29

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

can you post a picture or something