How many times can u subtract 10 from 100?

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

What is the average rate of change for this function for the interval from x=2 to x=4 ?

The parabola opens: y=√x-4 (principal square root) up down right left