Question: Nathan observes the growth of sunflower plants for a science project. He collects data on the relationship between the height, in centimeters, of each sunflower plant during a thirty-day period and the amount of fertilizer, in grams, used on each plant. The equation for the line of best fit for these data is y = 0.35x + 2, where y is the height of the plant in centimeters and x is the number of grams of fertilizer used. Based on the model, what does the slope of the line represent?
A) the height of the plant
B) the amount of fertilizer used
C) the average growth of the plant per gram of fertilizer used
D) the average amount of fertilizer used per centimeter the plant grew
Correct answer: C
Grade: 8 | Topic: Statistics and Probability | Difficulty: Medium | Standard: 8.SP.A.3