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Mathematics 15 Online
OpenStudy (anonymous):

Help please

OpenStudy (anonymous):

Please

OpenStudy (anonymous):

@Australopithecus

OpenStudy (australopithecus):

Where are you stuck exactly?

OpenStudy (anonymous):

like i dont understand question 4

OpenStudy (australopithecus):

Well two linear functions are the same if they have the same y-intercept and slope y = mx + b

OpenStudy (anonymous):

A and B are the same

OpenStudy (australopithecus):

yeah they are

OpenStudy (anonymous):

so A and B are eliminated

OpenStudy (australopithecus):

C just gives you values, you can either sub the x values into A and see if they give the same y

OpenStudy (anonymous):

so then D is correct

OpenStudy (australopithecus):

why do you say that

OpenStudy (australopithecus):

plug x=-2 into y = 3x + 1

OpenStudy (australopithecus):

what do you get?

OpenStudy (anonymous):

because when you plug in C into A it equals

OpenStudy (australopithecus):

test all the points

OpenStudy (australopithecus):

All functions are not linear

OpenStudy (anonymous):

i did and they all work

OpenStudy (australopithecus):

or it could have a different slope

OpenStudy (australopithecus):

but intersects at the same point as another function

OpenStudy (australopithecus):

Check once more

OpenStudy (anonymous):

ok

OpenStudy (australopithecus):

all points

OpenStudy (anonymous):

ok i got that c is the correct answer

OpenStudy (australopithecus):

:D good forgot to add the plus 1

OpenStudy (anonymous):

kk thanks

OpenStudy (australopithecus):

no problem hope I was helpful

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