Find the slope of the line through each pair of points

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.