Question

How much has the value of y changed between the points (–8, 4) and (8, –4)?




A.

1/2 units


B.

2 units


C.

8 units


D.

16 units

Answer 1

Please help

Answer 2

It might help to graph these two points, even though you were not asked to graph them.

We are interested only in how much y changes, not in how much x changes.

When two points, such as our (-8,4) and (8,-4), are given, a convention often used is to move from the one with the smaller x-value to the one with the larger x-value. Thus, in answering the present question, suppose you are moving from x=-8 to x=+8. If that's the case, by how much does y change? Is the change positive or negative?