MEDAL!!!
Find the x- and y-intercepts for the graphs of the relationships in the problem.

- calculusxy

MEDAL!!!
Find the x- and y-intercepts for the graphs of the relationships in the problem.

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- calculusxy

##### 1 Attachment

- calculusxy

@robtobey @jdoe0001

- calculusxy

@dan815

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## More answers

- dan815

an x value can have one y value only for it to be a function of only x

- calculusxy

But how is that answering the question? @dan815

- dan815

look at the pic you attached

- calculusxy

How would I figure out the x- and y-intercepts ?

- dan815

what is y when x=0,y-int
what is x when y=0, xint

- calculusxy

So for like A, would it be:
y-intercept : (0,4)
x-intercept: (1,0)
?

- dan815

x-intercept: (1,0) and (-1,0)

- calculusxy

Oh yeah. Thanks. Can I go over with you for the other three as well?

- dan815

okay

- calculusxy

Give me a moment please.

- calculusxy

I am confused on B.

- calculusxy

This is a function, but it doesn't look like a linear function. I wish I knew the slope, and then figure out "b."

- dan815

you work with the data only

- dan815

what is y when x=0,y-int
what is x when y=0, xint

- calculusxy

Oh.
y-int : (0,-3)
x-int : (19,0)

- dan815

yes

- calculusxy

C...

- calculusxy

y-int : (0,10)
x-int : (4.0)

- calculusxy

And then D...
y-int: (0,-1)
x-int : (1,0) and (-1,0)
?

- dan815

C)
y-int : (0,10)
x-int : (4,0) and (-2,0)

- calculusxy

Sorry missed the other. But thanks.

- dan815

D is right

- calculusxy

I have another question.

- dan815

ok

- calculusxy

Find the input for the following function with the given outputs. If there is no possible input for the given output, explain why not.
x = ?
\[f(x) = \sqrt{2x - 6}\]
\[\rightarrow f(x) = 10\]

- anonymous

d is correct

- dan815

\[10=\sqrt{2x-6}\\
10^2=2x-6\\
10^2+6=2x\\
\frac{(10^2+6)}{2}=x\]

- dan815

x=53

- calculusxy

x = 53 ?

- calculusxy

Okay. Thank you. And I just wanted to make sure my answers to two other questions.

- calculusxy

So this one is the same thing as the one that we just did right now but the number is different:
x = ?
\[f(x)=3x - 7\]
\[\rightarrow f(x) = -1\]
My answer is:\[x = 2\]

- dan815

3*2-7=-1

- calculusxy

This one is with the four graphs/tables that I gave at first in the attachment.
Question: Which of the relationships are functions? If a relationship is not a function give a reason to support your conclusion.
Answer: Relationships B, C, and D are all functions because every input has only one output. However, for A, you can see that for an input, you have several outputs.

- dan815

C is not a function

- dan815

of x

- calculusxy

So C is not a function?

- calculusxy

@dan815

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