You can put this solution on YOUR website! Approximate f(12.023) if f(12)=5 and f'(12)=-4
-----
If f'(12) = -4, the slope is -4
----
Form::
y = mx + b
solve for "b"::
5 = -4*12 + b
b = 53
-----
Equation::
f(x) = -4x + 53
---
f(12.023) = 4.908
---------
Cheers,
Stan H.
--------