Is what's highlighted considered an equation?

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent

Graph the equationy= x+3[tex]y = x + 3[/tex]

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)