The table shows how old a 20- to 50-pound animal is in relation to human years. Let H be the number of human years that is equivalent to x animal years. Complete parts a through c below.
Animal Years Compared with Human Years
Animal Years
Human Years

1
2
3
5
7
9
11
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15
a. Use a graphing calculator to draw a scatterplot of the data.
What variables should be represented by the axes?
A.
The variable x should be represented by the horizontal axis, and the variable H should be represented by the vertical axis because the number of animal years affects (explains) the number of human years (and not the other way around).
B.
The variable x should be represented by the horizontal axis, and the variable H should be represented by the vertical axis because the number of animal years does not affect (explain) the number of human years.
C.
The variable H should be represented by the horizontal axis, and the variable x should be represented by the vertical axis because the number of animal years affects (explains) the number of human years (and not the other way around).
D.
The variable H should be represented by the horizontal axis, and the variable x should be represented by the vertical axis because the number of human years affects (explains) the number of animal years (and not the other way around).
E.
The variable x should be represented by the horizontal axis, and the variable H should be represented by the vertical axis because the number of human years affects (explains) the number of animal years (and not the other way around).