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# Help me with this quadratic graph question?? watch

1. Use the graph (y=2x^2) to estimate the value of √ 5

How would you do this??
2. No idea and want to know the answer too :^(
Hate being a brainlet tbh.
3. (Original post by Qwalk)
No idea and want to know the answer too :^(
Hate being a brainlet tbh.
I have maths gcse this friday lol I'm not ready at all.
4. (Original post by Sizzo1128)
I have maths gcse this friday lol I'm not ready at all.
Aren't you doing A-Level maths?
5. What does the graph you already have look like? That may trigger some knowledge otherwise it's just words to me tbh
6. (Original post by Sizzo1128)
Use the graph (y=2x^2) to estimate the value of √ 5

How would you do this??
If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

Hope this helps.

EDIT - Recommended website: https://www.desmos.com/calculator
7. (Original post by Sizzo1128)
Use the graph (y=2x^2) to estimate the value of √ 5

How would you do this??
Can you please post a picture of the graph that you are given in this question? The method to use could depend on the axes scales.

EDIT: Actually I'm guessing the y-axis must go up to 10.
8. (Original post by Sizzo1128)
Use the graph (y=2x^2) to estimate the value of √ 5

How would you do this??
Just look where and read off the approximate coordinate.
9. (Original post by Ashtan)
What does the graph you already have look like? That may trigger some knowledge otherwise it's just words to me tbh

10. (Original post by JemmaSimmons)
If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

Hope this helps.
Yes what he said
11. (Original post by JemmaSimmons)
If x= root 5, y would = 2*5=10. So find where y=10 on the graph and find the corresponding value of x. This should be approximately equal to root 5. You can always check your answer with a calculator.

Hope this helps.
AHHH I finally get it!!! THANK YOUUUU
Yes what he said
At the time of writing, he hadn't said anything.
13. (Original post by Sizzo1128)
AHHH I finally get it!!! THANK YOUUUU
You're welcome, any time.
14. (Original post by rdkgames)
just look where and read off the approximate coordinate.
thank you!
15. (Original post by JemmaSimmons)
At the time of writing, he hadn't said anything.
Yes because you got there before me, but what you said is correct

Highest level of qualification:
BSc Mathematics
MSc Aerospace Engineering
Yes because you got there before me, but what you said is correct

Highest level of qualification:
BSc Mathematics
MSc Aerospace Engineering

Well in that case, no comment was required.
Good to know, but, ironically, this isn't rocket science.

Never mind. Have a nice day.
17. (Original post by JemmaSimmons)
Well in that case, no comment was required.
Good to know, but, ironically, this isn't rocket science.

Never mind. Have a nice day.
Have a nice day darling

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