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Mathematics 21 Online
OpenStudy (anonymous):

Check my answer please?

OpenStudy (anonymous):

OpenStudy (anonymous):

My answer was B sorry about that!!!

hartnn (hartnn):

how b ?

hartnn (hartnn):

take x=0 , find y take x=3, find y take x= 6, find y

hartnn (hartnn):

and its not b

hartnn (hartnn):

what is y when x = 0 ?

OpenStudy (anonymous):

Y = 0?

hartnn (hartnn):

no! y = 1/3 |0| - 2 y = 0-2 y=-2

hartnn (hartnn):

which graphs has y intercept as -2 ?

OpenStudy (anonymous):

4

hartnn (hartnn):

4 ?

OpenStudy (anonymous):

D*

hartnn (hartnn):

thats correct, but even A has y-intercept has -2

hartnn (hartnn):

to choose between A and D find x intercepts for that plug in y=0

OpenStudy (anonymous):

Oh alright I think I get it a little bit.

hartnn (hartnn):

0 = 1/3 |x| -2 so, |x| = 6 for which 2 values of x, is |x| = 6 you know?

OpenStudy (anonymous):

Mhm

hartnn (hartnn):

when |a| = b a=b , -b

hartnn (hartnn):

so when |x| = 6 x= 6,-6 so which graphs has x intercepts as 6 and -6 ?

OpenStudy (anonymous):

B

hartnn (hartnn):

from A and D, x intercepts 6 and -6 are for graph D

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