I can use a double number line to represent a multiplicative relationship and connect to other known representations.
I can use a double number line to represent a multiplicative relationship and connect to other known representations.
Proportionality - Proportionality means when variables are in proportion if they have a constant multiplicative relationship.
Ratio - A ratio shows the relative sizes of 2 or more values and allows you to compare a part with another part in a whole.
Both lines of a double number line must start at zero and these zeros must be aligned.
When drawing double number lines, ensure to align the zeros and the known equivalents. Showing how a graph is formed from a DNL can help.
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a) - For every $$x$$, there is 1 $$y$$
b) - For every 6 $$x$$s, there are 21 $$y$$s
c) - For every 6 $$x$$s, there are 42 $$y$$s
d) - For every 6 $$x$$s, there are 9 $$y$$s
