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# Linear Function Formula

A linear function is a polynomial function whose graph gives a straight line. The linear function formula is of the form

Here x is independent variable, Y is dependent variable, m is slope and c is intercept.

Suppose the equation of line passes through the points (x1,y1) and (x2,y2) in a graph then the linear function is given by

Then the slope m is given by

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## Linear Function Examples

Lets see some examples on linear function:

### Solved Examples

Question 1: Solve: 3x + 5 = 0
Solution:

Given function is 3x + 5 = 0
3x + 5 = 0
3x = -5
x = $\frac{-5}{3}$ = - 1.667

Question 2: Solve: 4x - 7 = 0
Solution:

Given function is 4x - 7 = 0
4x - 7 = 0
4x = 7
x = $\frac{7}{4}$ = 1.75

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