What is the length of a line segment whose endpoints have coordinates (5,3) and (1,6)

Which of the following describes the symmetry of the graph of y = x3?

Bring the fraction a/a-4 to a denominator of 16-a^2

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2