The two linear functions ƒ(x) and g(x) are shown below. ƒ(x) = x + 3

Which of the following is true?

The rate of change of the function g(x) is –2.
The rate of change of ƒ(x) is times the rate of change of g(x).
The rate of change of ƒ(x) is greater than the rate of change of g(x).
The product of the rate of changes of ƒ(x) and g(x) is -6.
What is the slope of a line perpendicular to the line y = 2x + 5?