What is the rate of change when the input is 9 and the output is also 9

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

Given right triangle a w/a hypotenuse length of x+4 and a leg of x, and right triangle b, w/ a hypotense length of 3y and a leg length of y+4 for what values of x and y are the triangles congruent by hl?