The linear function is a polynomial of degree zero or 1. It gives a straight when plotted on graph and has the form
y = f(x) = ax + b where a and b will be given and x needs to be found out. Here in this function y is dependent variable and x is  independent variable.

Linear function Calculator is a online tool to calculate this linear function. you just have to enter the value of a and b in the block provided and get the value of x instantly. 
Lets see how to solve the linear function using steps:
Step 1: Read the problem and observe whether the equation is of the form ax + b = 0 and note down the values of a and b.
Step 2: Solve for x using the values of a and b.