My brain hurts what’s the answer and how you get the answer

Which term best describes the association between variables a and b

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second