Answer:
f(-3) = -8
Step-by-step explanation:
It is given that f(x) = - x² + 1. Find the value of f(x) by substituting x = -3 into f(x)
f(x) = - x² + 1
f(-3) = -(-3)² + 1
= -9 + 1
= -8
How? I really would like to know
Answer:

Step-by-step explanation:
We use the slope formula:

The slope or gradient is not very difficult to calculate.
The given points are:
A(a,b) and B(c,d)
We substitute these points into the formula to get:

Note that this is also the same as:

- 14,000 feet hopefully....