The bar graph shows the estimated number of
K
3200 Females
Group 4
Males
Group 3
2407
2210
calories per day needed to maintain energy balance Calories Needed to Maintain Energy Balance for Sedentary Lifestyles
for various gender and age groups for sedentary
lifestyles. (Sedentary means a lifestyle that includes
only the light physical activity associated with typical
day-to-day life.) The mathematical model
F=-81x² +655x+617 describes the number of
calories needed per day, F, by females in age group
x with sedentary lifestyles. According to the model,
how many calories per day are needed by females
between the ages of 9 and 13, inclusive, with this
lifestyle? Does this underestimate or overestimate
the number shown by the graph? By how much?
Calories per Day
2400
Group 2
Group 116751795 1931
1600- 1407
1121
800-
***
0-
4-8
9-13
Group 5
2193
1861 1797
14-18 19-30 31-50
Age Range
Group 6
1996
1553
51+
According to the model, how many calories per day are needed by females between the ages of 9 and 13,
inclusive, with this lifestyle?
Type a whole number.)