The bar graph shows the recommended number of hours of sleep for each age group.

how many hours of sleep are recommended for elementary-age children?
exactly 9 hours
exactly 10 hours
about 10 hours
about 12 hours

The answer is about 10 hours. The recomened amount of sleep for school aged children between the ages of 6-13 years old is 9-11 hours of sleep per night.

about 10 hours

Step-by-step explanation:

the answer to the question is a  

it has the same slope and the same y-intercept.

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation: