Jesse takes two data points from the weight and feed cost data set to calculate a slope, or average rate of change. A ferret weighs 2.1 pounds and costs $3.40 per week to feed, while a Labrador Retriever weighs 70 pounds and costs $7.50 per week to feed.

Question

Using weight as the explanatory variable, what is the slope of the line between these two points? Answer choices are rounded to the nearest hundredth.

$1.62 / lb.

$16.56 / lb.

$.06 / lb.

$1.73 / lb.

Answer 1

The two points are (2.1,3.40) and (70,7.50)
Now calculate the slope in the usual way.