Thread: Math B Regents June 2007

I want to know how to do #18 on the multiple choice section.

http://nysedregents.org/testing/mathre/b-607.pdf

Did you graph the function?
What is the value if t=-273?
What is the value if t=0?
What is the value if t=16?

Originally Posted by Plato

Did you graph the function?
What is the value if t=-273?
What is the value if t=0?
What is the value if t=16?

substituting t for -273, 0 and 16 in that order would give me the following values... 330.45, 0, and 340

I really don't know if this is what you meant, i was looking for more of a step by step explanation.

Do you have a graphing calculator? If so, use it.
If not, why not?

I do have one, im plugging in the equation to graph but i cant see anything. Can somebody just tell me step by step.

Originally Posted by patman9082

I do have one, im plugging in the equation to graph but i cant see anything. Can somebody just tell me step by step.

That would probably be because your window view settings are off.

First of all, what is the domain of this function (i.e., the values of for which it is defined)? Answering that alone should give you the answer.

If you want to look at it another way, think about what the square root function looks like. What happens to its graph when you start to add constant values under the radicand?

All these responses are just firing questions at me, all i would like is someone to take me through it step by step.

Originally Posted by patman9082

All these responses are just firing questions at me, all i would like is someone to take me through it step by step.

Here is my step-by-step process, part of which you were already given:

1. Find the domain of the function
2. Find the range of the function
3. Find the x- and y-intercepts of the function
4. (If you know calculus) Determine on which intervals the function is increasing/decreasing, determine concavity, find extrema and inflection points
5. See which graph best matches the gathered information, or if you need to draw the graph, plot the intercepts and a few points on the curve and connect them smoothly

What more do you want, short of a full solution?