Help ⬇️⬇️⬇️ This math needs done and Idek how to do it

You can run 4 laps in 10 minutes your friend can run 6 laps in 15 minutes. are these rates proportional

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm