How To Make A Straight Line Equation From The Graph

There are two formulas for creating equations Straight lines from a graph, among them are:

1. The formula makes the equation of a straight line from a straight-line graph passing through the point (0,0). For more details can be seen graph below:

From the graph above, then the formula to make the equation of the line is:

Example:
Please determine the line equation from the graph below!

Answer:
a = 6
b = 4

So the line equation of the above graph is 3y = 2x.

2. The formula creates a straight-line equation of a straight-line graph that does not pass through a point (0,0). For more details can be seen graph below:

From the graph above, then the formula to make the equation of the line is:

Example:
Please determine the line equation from the graph below!

Answer:
a = 3
b = 4

bx + ay = ab
4x + 3y = 3 . 4
4x + 3y = 12

So the line equation of the above graph is 4x + 3y = 12.

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Referensi :

• To'Ali's book math group accounting and sales

Sumber http://matematikaakuntansi.blogspot.com

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