QuestionWhen proportional relationships are graphed, the points the line runs through can be used to find the constant of proportionality.
This line runs through points $(2,2),(4,4),(6,6)$, and $(8,8)$. First, find the proportion of this relationship by choosing one point and inserting its coordinates into the proportion equation. $$k=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \text { or } k=\frac{4-2}{4-2}=\frac{2}{2}=1$$
The constant of proportionality for this line is 1.
Find the constant of proportionality for each graph. I. $k=$ $\qquad$ 2. $k=$ $\qquad$ b $k=$ $\qquad$ $k=$ $\qquad$ Math