Need will do anything

use the substitution method.

{j+k=3
{j-k=7
there are an infinite number of solutions.

there is no solution.

the solution is (5, −2).

the solution is (8, 1).

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.

step-by-step explanation:

there's the chart