Graph Function Calculator

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A function is an expression written in terms of the independent variable ‘x’. A function is represented by ‘f(x)’ notation and it gives the ‘y’ value of the equation. To graph a function we can pick random values for ‘x’ and then find the appropriate ‘y’ values. Graph function calculator is an easy online tool which can find the ‘x’ and ‘y’ values and then plot them on the X-Y plane.

Example 1: Find any 3 coordinate points for the function, f(x) = x + 2.

Given function: f(x) = x + 2

In order to find the coordinate points, we can first give random values for ‘x’.

Let x = 0, then f(0) = 0+ 2 = 2 > (x, y)= (0, 2)

Let x = -1, then f(-1) = -1+ 2 = 1 > (x, y)= (-1, 1)

Let x = 1, then f(1) = 1+ 2 = 3 > (x, y)= (1, 3)

Hence > (0, 2), (-1, 1), (1, 3) are few coordinate points for the given function.

Example 2:Find any 3 coordinate points for the function, f(x) = 2x + 1.

Given function: f(x) = 2x+ 1

In order to find the coordinate points, we can first give random values for ‘x’.

Let x = 0, then f(0) = 2(0)+ 1 = 1 > (x, y)= (0, 1)

Let x = -1, then f(-1) = 2(-1)+ 1 = -1 > (x, y)= (-1, -1)

Let x = 1, then f(1) = 2(1)+ 1= 3 > (x, y)= (1, 3)

Hence > (0, 1), (-1, -1), (1, 3) are 3 coordinate points for the given function.