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Mathematics 21 Online
zarkam21 (zarkam21):

Help please please please xx

zarkam21 (zarkam21):

OpenStudy (andone2.0):

with what

OpenStudy (mathstudent55):

Here is a suggestion. Use technology to graph them. Then apply the vertical line test.

Nnesha (nnesha):

graph all the equations and then do vertical line test if the line intersects the graph more than 1 then the equation doesn't represent a function

zarkam21 (zarkam21):

Okay let me graph them

zarkam21 (zarkam21):

Okay so here is my graph

zarkam21 (zarkam21):

zarkam21 (zarkam21):

and I think the answers are c and d?

Nnesha (nnesha):

for example this the vertical line intersects the graph 2 times so it's not a function when line intersects 2 times that means x values are repeating

zarkam21 (zarkam21):

I think b and c?

zarkam21 (zarkam21):

because they look like they are functions

Nnesha (nnesha):

OpenStudy (phi):

Use the vertical line test (If a vertical line goes through the curve more than once, it's not a function) also, you know lines y= mx and parabolas, y = x^2 are functions

OpenStudy (phi):

if you see a y^2, that is a clue it's not a function

zarkam21 (zarkam21):

So b and D?

Nnesha (nnesha):

yes. when you draw a line on A ,C graph you will see the line intersects the graph more than once

zarkam21 (zarkam21):

So are those the only and final answers?

Nnesha (nnesha):

yes y=x^2-2 and y=6x represents the function

zarkam21 (zarkam21):

Thank you so much

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

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