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Mathematics 22 Online
OpenStudy (gokuporter):

http://prntscr.com/9lhnac

OpenStudy (dannyo19):

Are you familiar with y=mx+b form?

OpenStudy (gokuporter):

Is the slope 8/4?

OpenStudy (dannyo19):

Yes

OpenStudy (dannyo19):

What does that make your b?

OpenStudy (gokuporter):

Do I distribute? @DannyO19

OpenStudy (dannyo19):

8/4 or 2 is your slope or m

OpenStudy (gokuporter):

So if we're using points (5,6) is 2 * 5

OpenStudy (gokuporter):

.-.

OpenStudy (dannyo19):

So you have y=2x+b at (5,6) and (9,14) so use either point 6=10+b or 14=2(9)+b

OpenStudy (gokuporter):

Do we add from both sides to get b?

OpenStudy (dannyo19):

You would subtract from both sides of one of the equations..

OpenStudy (gokuporter):

So is 4 b?

OpenStudy (dannyo19):

9*2 is 18 So what do you do to get 14 out of 18?

OpenStudy (dannyo19):

14 from 18?

OpenStudy (gokuporter):

4?

OpenStudy (dannyo19):

subtract 4

OpenStudy (dannyo19):

The sign is important

OpenStudy (dannyo19):

I4-18=-4

OpenStudy (gokuporter):

Okay so b is -4

OpenStudy (gokuporter):

So y= 2x - 4?

OpenStudy (dannyo19):

Right

OpenStudy (gokuporter):

But there's a plus symbol .-.

OpenStudy (dannyo19):

Technically it would be y=2x+(-4) but this is synonymous with y=2x-4

OpenStudy (gokuporter):

Thanks ^-^

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