Practice Final
f(x) = -x
2
+ 4
When x = 3 f(x) = -5
When x = 2 f(x) = 0
This gives us the coordinates (3, -5) and (2, 0).
Using the slope formula:
m =
y
2
- y
1
x
2
- x
1
m =
-5 - 0
3 - 2
We find that the slope is -5 which is the approximate rate of change.
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