When variable A rises by 10 units, variable B rises by 15 units.The slope of the line describing this relationship is
A)always 2/3.
B)either 2/3 or 1.5, depending on which variable goes on which axis of the graph.
C)either 1.5 or −1.5, depending on which variable goes on which axis.
D)always −1.5.

Question

Quizplus · Accepted Answer

Slope is defined as the change in y-axis (variable B) divided by change in the x-axis (variable A). Here, when A rises by 10 units, B rises by 15 units. So, the slope is 15/10 or 1.5. However, depending on which variable is chosen for the x-axis and which for the y-axis, the slope will be either 1.5 or its reciprocal -1.5. Therefore, the correct choice is B.

When Variable a Rises by 10 Units, Variable B Rises