If the relationship between the manipulated variable and the responding variable is an inverse proportion, what will a line graph of this relationship look like?
a. a straight line
b. a curved line
c. a jagged line
d. none of the above

The correct answer for this question is "B. a curved line." If the relationship between the manipulated variable and the responding variable is an inverse proportion, the line graph of this relationship will look like a a curved line. Inverse of that line will give you a curved line.