Option #1:

f(4), this means that x = 4
To find f(4), substitute/plug in 4 into "x" in the function:
Plug in 4 into "x" since x = 4


f(4) = 2
Option #2:

f(4), this means that x = 4
To find f(4), substitute/plug in 4 into "x" in the function:

To combine fractions, they need to have the same denominator. Multiply -3 by
so that they have the same denominator.

Combine the fractions
Simplify the fraction

Yes, it is a function, because no x value is repeated.
Answer:
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Step-by-step explanation:
To my best knowledge the slop that is increased is number 3 it is moving up in a slop and it is sloped.