1. A proportional relationship is graphed passing through the point $(4, 20)$. Write the equation for this relationship in the form $y = mx$. The equation is $y = \text{\_\_\_}$.
2. Which equation represents a proportional relationship that passes through the point $(6, 18)$?
3. To graph the equation $y = \frac{7}{3}x$, you start by plotting the origin $(0, 0)$. What is the correct next step to find a second point using the slope?
4. A line representing a proportional relationship passes through the point $(5, 35)$. What is the constant of proportionality, $m$? $m = \text{\_\_\_}$.
5. The equation for a proportional relationship is $y = 6x$. Besides the origin, which of the following points lies on the graph of this equation?
6. A graph shows the distance a train travels in miles versus time in hours. If the point $(4, 240)$ is on the graph, what does it represent?
7. A proportional relationship is graphed with cost on the y-axis and tickets on the x-axis. The point $(8, 40)$ is on the graph. What is the unit rate in dollars per ticket? ___
8. On a graph showing a proportional relationship between earnings and hours worked, what does the point $(1, 22)$ represent?
9. A graph shows the number of cookies baked over time. The point $(3, 75)$ is on the graph. This means the point $(1, r)$, which represents the unit rate, is also on the graph. What is the value of $r$? ___
10. The graph of a proportional relationship must pass through a specific point that shows that zero units of one quantity corresponds to zero units of the other. Which point is this?