Constant of proportionality is 7. It means for every pound of pastrami, you pay $7.
To find the constant of proportionality in the graph, we can choose any two points on the line and divide the y-coordinate of one point by the x-coordinate of the same point. The result will be the constant of proportionality.
Let's choose the points (3.5, 20) and (0.8, 5.6).
Constant of proportionality = (20 / 3.5) = (5.6 / 0.8) = 7
Therefore, the constant of proportionality is 7. This means that for every pound of sliced pastrami, the customer pays $7.
Another way to find the constant of proportionality is to use the following formula:
Constant of proportionality = y / x
where y and x are the coordinates of any point on the line.
Using this formula, we can get the same result as before:
Constant of proportionality = 20 / 3.5 = 5.6 / 0.8 = 7
The constant of proportionality is a useful measure of how two quantities are related to each other. In this case, the constant of proportionality tells us that the customer pays $7 for every pound of sliced pastrami.