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Question

Kayla consumed 1800 calories on Monday. She consumed 500 more calories on Tuesday than she did on Monday. On Wednesday, she consumed 100 calories less than she had on Tuesday. Find the rate of change in calorie intake from Monday to Wednesday.

Answer 1

I have a different view. Since we are asked to find the rate of change from Monday to Wednesday, we are dividing by 2, since Monday is day 1 and Wednesday is day 3. 3 - 1 = 2.

1800 + 500 = 2300 calories consumed Tuesday.

2300 - 100 = 2200 calories Wednesday.

(2200 - 1800)/2 = 400/2 = 200 calories

Answer 2

Monday 1800

Tuesday 2300

Wednesday 2200

It is 3 whole days: All of MOnday, all of Tuesday, and ALL of Wednesday.

Rate of change = (2200-1800)/3 = 400/3 = 133 and 1/3