Function Notation

Function notation is a way to represent a function using symbols, typically in the form f(x), where f is the name of the function and x is the input variable.

f(8) represents the output of the function f when the input is 8.

f(2) = 2(2) + 3 = 7.

It means that after 4 weeks, the height of the plant is 5 inches.

f(x) = 2x - 3.

f(-3) = (-3)^2 = 9.

f(x) is another way to express y, where y is the output of the function for a given input x.

f(0) = 3(0) - 4 = -4.

It means that when the input is a, the output of the function f is b.

f(-1) = 2(-1)^2 + 5(-1) - 17 = -20.