Function Calculator

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Function is a relationship between two variables, one being independent variable (usually represented by ‘x’) and the other variable is dependent variable (usually represented by ‘y’). The ‘y’ value is also called as the ‘function value’. Function calculator is the instant online tool which can find the function or the ‘y’ value, given the ‘x’ value.


Example 1: Find the ‘y’ value given the function, f(x) = 3x + 2 and the ‘x’ value is 5.

Given function >  f(x) = 3x + 2 and x = 5

Now given the value of ‘x’ = 5 and if we plug in the ‘x’ value in the given ‘f(x)’, we get

f(5) = 3(5)  +2

f(5) = 15 + 2

f(5) = 17

Hence when x = 5, then the function value or the ‘y’ value = 17 for the given function.



Example 2: Find the ‘y’ value given the function, f(x) = 4x - 1 and the ‘x’ value is -2.

Given function > f(x) = 4x - 1 and x = -2

Now given the value of ‘x’ = -2 and if we plug in the ‘x’ value in the given ‘f(x)’, we get

f(-2) = 4(-2)  - 1

f(-2) = -8 - 1

f(-2) = -9

Hence when x = -2, then the function value or the ‘y’ value = -9 for the given function.



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