A baseball weight approximately 1/3 pound. A golf ball weights about 1/10

When only separate discreet points are graphed it is called?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula