Geometry 10th Grade. Help but only with right answers don't waste the answers

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Consider the function represented by the equation 1/2 j + 1/4 k equals 3 which shows the equation written in function notation with j as the independent variable

Do,h = (7, 9) (14, 18) the scale factor is