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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
Linear Function

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

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

Then the slope m is given by
Slope Formula

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Linear Function Examples

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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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