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Mathematics 16 Online
OpenStudy (anonymous):

help me plz!

OpenStudy (anonymous):

OpenStudy (joannablackwelder):

Try plugging in the x values and see if you get the correct y value using each equation.

OpenStudy (joannablackwelder):

For example, using y=x works for (1,1), but not for (2,8)

OpenStudy (joannablackwelder):

Make sense?

OpenStudy (anonymous):

so is it B ?

OpenStudy (anonymous):

i just dont get the 2 on top :/ @JoannaBlackwelder

OpenStudy (joannablackwelder):

No, I don't get B. What do you mean the 2 on top?

OpenStudy (anonymous):

like on b how the 2 is on top i dont know what that means?

OpenStudy (joannablackwelder):

I think you mean the exponent.

OpenStudy (anonymous):

is it c? i just need help so i can get the rest!

OpenStudy (anonymous):

yeah how does the exponent work?

OpenStudy (joannablackwelder):

The exponent means how many time you multiply the base together.

OpenStudy (joannablackwelder):

For example, 2^2 means 2*2.

OpenStudy (joannablackwelder):

3^2 means 3*3 or 9.

OpenStudy (joannablackwelder):

Make sense?

OpenStudy (anonymous):

yes so whats the answer ? :/ @JoannaBlackwelder

OpenStudy (joannablackwelder):

You tell me which equation works now that you are understanding exponents.

OpenStudy (joannablackwelder):

For B, 1^2 = 1, so the first pair of numbers works. How about 2 and 8?

OpenStudy (joannablackwelder):

Does that work for y=x^2?

OpenStudy (joannablackwelder):

In other words, does 2^2=8?

OpenStudy (anonymous):

nope!

OpenStudy (joannablackwelder):

Good! So B is out. Can you try C?

OpenStudy (anonymous):

ok C is wrong because 2* 3 = 6 so it must be D ?

OpenStudy (joannablackwelder):

Exponents aren't the same as multiplication. You need to multiply the base number as many times as the exponent says. So, 2^3 = 2*2*2

OpenStudy (anonymous):

oh so its C ?(:

OpenStudy (joannablackwelder):

Right :) Since 3^3 = 3*3*3=27

OpenStudy (joannablackwelder):

and 4^3=4*4*4=64 :)

OpenStudy (anonymous):

omfg thanks so much i finally get it !((:

OpenStudy (anonymous):

@JoannaBlackwelder

OpenStudy (joannablackwelder):

You are very welcome! :)

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