Answer
C. The relationship is proportional with the point (1,60) representing the unit rate.
Explanation
Let’s say 2 variables are x and y
Now give those 2 variables names
x = number of trainers sold
y = profit
A proportional relationship is one where 2 variables are related by some constant k
e.g y = kx
As x increases so does y. So as more trainers are sold more profit is made.
If there is no relationship the points will be scattered in the diagram however here they have a perfect linear relationship.
Unit rate, is the rate that the y variable increases as the x variable increases by 1.
Which in this instance is 60 for every 1 increase in x value.
Hope this helped
