Use Pythagoras theorem:
a^2 = b^2 + c^2
-15^2 + 18^2 = a^2
a^2 = 99
a = root of 99
-13F is less than -12F and -9F is greater than -12F
Answer:
The answer is 2
Step-by-step explanation:
Rate of change of function is given by :

For function y = 6,
rate of change =

because the function is independent of x.
For function y = 2·x + 7,
rate of change =

So, the rate of change of 2 is greater than rate of change of function 1 by 2 - 0 = 2.