Slope intercept from a table

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

Select the lengths in centimeters that would form a right triangle

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.