Please help me identify the range!

And please provide steps on how to get the right answer.

9514 1404 393

  C.  -1 ≤ y ≤ 1

Step-by-step explanation:

The range is the vertical extent of the graph.

Here, the graph goes back and forth between y = -1 and y = +1, so the range is the interval -1 to +1, with those values included. Written as an inequality, it is ...

  -1 ≤ y ≤ 1

Written in interval notation, it is ...

  [-1, 1] . . . . using square brackets to indicate the end values are included

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Curly brackets { } are used to delimit a set. That is {-1, 1} means the y-values consist only of -1 or 1 and nothing else. Obviously, that is not the case here.

So, the steps are ...

  1) understand the vocabulary, so you know what the question is asking

  2) be able to read a graph and identify high points and low points

  3) recognize the various ways the answer can be written

  4) locate one of those answer possibilities in the list of choices offered

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step-by-step explanation:

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.