55.55 how many points need to be removed from this graph so that it will be a function? 1 point 2 points 3 points 4 points

Need solving this second acceleration problem.

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?