Straight line graphs use the equation y=mx+c, where m is the gradient or slope of the line and c is the y-intercept. The document explains key terms like x, y, m, and c used in straight line graphs and provides examples of how straight line graphs can show relationships between different variables.

1. Straight Line
Graphs
Objective: To understand the concept of straight
line graphs.
By Tife, Deborah, Jenny
& Shane

2. y
x = -1 x=2
-x = y
y=x
3
2
1
-4 -3-2-1 0 1 2 3 4 x
-1
-2
y=x -3 x = -y

4. Explaining Y=mx+c
Y: Whatever is plotted on the Y axis.
X: Whatever is plotted in the X-axis
C: The reading on the Y-axis where the
graph crosses it
M: The gradient of the graph
Gradient: The slope of the line on the graph

5. How can straight line graphs be
used.(why bother learning about
them)?
Straight line graphs are used for showing relations
between differnt things e.g
Text