Find f (-4), f (-3.1), f (1.2) and f (2.8) for f (x) = x

The answer is f (-4) = - 4, f (-3.1) = - 3.1, f (1.2) = 1.2, f (2.8) = 2.8

Step-by-step explanation:

We have to find out f (-4), f (-3.1), f (1.2), f (2.8)

For the condition f (x) = x

This means that whatever we give input to the function the value to the

function is equal to the value input this means that

f (input) = output

Here output = input

f (input) = input

∵ f (-4) = - 4

f (-3.1) = - 3.1

f (1.2) = 1.2

f (2.8) = 2.8