Which expression is equivalent to 4/5x + 11/5?*

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)