Drawing Straight Line Graphs Tutorial
math tutorials > drawing straight line graphs from a formula
How to draw a straight line graph from an equation.
Straight Line Graph Equations
The general equation for a straight line is: y = mx + c
- x and y have a power of 1
- m is the gradient (steepness) of the line and is a number
- c is the y-intercept of the line and is a number.
These are all straight line graphs:
- y = 2x + 1
- y = x
- y = 7
- x = -2
- 3y + x = 1
Drawing lines using the tabular method
The graph is drawn by setting up a table of values for x and calculating the corresponding y value using the equation given. The points are then plotted and joined by a straight line.
Graphing problems for you to try
1) y = 3x + 2
2) x + y = 5
3) y = 4 – x