A(-1,2)b(-7,4) find the midpoint of ab

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?