The value of function f(x) = 4x - 20 at x = 4 is -4.
What is Function?
The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.
Here,
f(x) = 4x - 20
Put x = 4, we get
f(4) = 4 X 4 - 20
f(4) = 16 - 20
f(4) = -4
Thus, the value of function f(x) = 4x - 20 at x = 4 is -4.
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