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Mathematics 14 Online
Someoneee:

SS is in comments

Someoneee:

Someoneee:

im going to need help finding each one of them

AZ:

The vertex is the tip part of the parabola so look at your image, what is that point where the vertex is at

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Someoneee:

-1,4

AZ:

Exactly! The axis of symmetry is basically written in the form x = some number and that number is the x-value of the vertex what is the x-value of the vertex? so then how would you write the axis of symmetry

AZ:

the axis of symmetry is basically going to be a vertical line that splits the graph in two equal halves

Someoneee:

X= -1?

AZ:

Exactly! and now the max/min when you have a graph like this, the vertex is going to be the maximum |dw:1617982246866:dw| so what is the maximum?

Someoneee:

4

AZ:

and this is just in case you have more similar questions, if you graph looked like this then the vertex would be the MINUMUM |dw:1617982304678:dw|

AZ:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Someoneee 4 \(\color{#0cbb34}{\text{End of Quote}}\) No, write it as a point basically the answer is the same as the vertex

Someoneee:

(-1,4)

Someoneee:

or would it be (4,-4)?

Someoneee:

I don't know the range, so I don't know what the minimum would be

AZ:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Someoneee (-1,4) \(\color{#0cbb34}{\text{End of Quote}}\) yes, this is the maximum point

AZ:

this graph doesn't have a minimum because it keeps going on to negative infinity

Someoneee:

oh, ok

Someoneee:

y=3, and x=-3 or 1?

AZ:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Someoneee y=3, and x=-3 or 1? \(\color{#0cbb34}{\text{End of Quote}}\) which one is which? and can you write them as points

Someoneee:

y is (0,3) x is (-1,0)?

AZ:

the x-intercept is the points where the graph crosses the x-axis so when y = 0 the y-intercept is where the graph crosses the y-axis so when x = 0 what are the x and y intercepts?

AZ:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Someoneee y is (0,3) x is (-1,0)? \(\color{#0cbb34}{\text{End of Quote}}\) good but you're missing one more x-intercept

Someoneee:

oh, x would be either (1,0) or (-3,0)

AZ:

oh you got the x-intercept wrong \(\color{#0cbb34}{\text{Originally Posted by}}\) @Someoneee oh, x would be either (1,0) or (-3,0) \(\color{#0cbb34}{\text{End of Quote}}\) yup, those are your two x-intercepts

Someoneee:

So how do I find the domain now?

AZ:

What are all the possible x-values for the graph?

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Someoneee:

-3, -1, 1

AZ:

those are some possible x-values, but can't x be any value?

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Someoneee:

yea

AZ:

^That's just an example to help you see usually the domain is just all real numbers and the range is determined by the max/min

Someoneee:

so the range would be -1,4?

AZ:

No, that's not how you write domain and range domain is all the possible x-values range is all the possible y-values (-1, 4) is just a point It tells you that the maximum y-value is 4 and when you look at the graph, you see that the graph keeps going down and down and so the possible y-values is all the way from negative inifnity to 4 does that make sense?

Someoneee:

Yes

Someoneee:

what would I write as the range then?

AZ:

It depends on how they expect you to write it have you learned interval notation?

Someoneee:

No

AZ:

Then write it as an inequality You can see that graph I sent earlier as an example for the domain but for range, how would you write it? the possible y-values are any number less than or equal to 4 what is that as an inequality?

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