Find the constant of variation and the slope of the direct variation model y=2x

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Which rectangle if translated 6 units right and 16 units down and the rotated 90° clockwise about the point (4, -11) will result in rectangle e?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.