b
5
X
Example
The three graphs show different relationships between x and y. Does each
graph show a proportional relationship?
Graph A
Graph B
8
N 696
4
O
y
2 4 6 8
8
6
4
y
2 4 6 8
8
6
4
2
y
Graph C
2 4 6 8
Graph A shows a straight line that passes through the origin. It shows a
proportional relationship between x and y.
Graph B is a straight line, but it does not pass through the origin. It does not
show a proportional relationship between x and y.
Graph C is not a straight line and does not pass through the origin. It does not
show a proportional relationship between x and y.
1
a. Is there a change you could make to Graph B from the Example so that it would
show a proportional relationship? Explain.