Question

chau is walking. the number of calories he has burned varies directly with the number of minutes he has walked. see the graph below. (a) how many calories is chau burning per minute? square calorie(s) (b) what is the slope of the graph? square

Explanation:

Step1: Identify direct variation point

Pick a point from the graph, e.g., $(x=10, y=20)$.

Step2: Calculate calories per minute

Divide calories by minutes: $\frac{20}{10}=2$

Step3: Calculate slope of the graph

Slope = $\frac{\text{Change in } y}{\text{Change in } x} = \frac{20-0}{10-0}=2$

Answer:

(a) 2 calorie(s)
(b) 2