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Mathematics 19 Online
OpenStudy (mnr134):

What is the equation of the line? A. 7 x − 4 y equals 28 B. 7 x plus 4 y equals 28 C. negative 4 x plus 7 y equals 28 D. negative 4 x plus 7 y equals negative 28

OpenStudy (mnr134):

OpenStudy (aveline):

Why don't you start out by writing A-D as equations with y isolated?

OpenStudy (mnr134):

A.7x-4y=28 B.7x+4y=28 C.-4x+7y=28 D.-4x+7y=-28

OpenStudy (threshsupport):

you need to run then through i forgot the process to make them look like ex"y=4x+5"

OpenStudy (threshsupport):

its called slope intercept form

OpenStudy (threshsupport):

it makes this way easier

OpenStudy (threshsupport):

bumps but doesn't reply

OpenStudy (aveline):

We know that (0,-4) is a point. A.7x-4y=28 0+16 doesn't equal 28, so it can't be A B.7x+4y=28 0-16 doesn't work either C.-4x+7y=28 D.-4x+7y=-28 Which one, C or D, works?

OpenStudy (mnr134):

im not sure which one

OpenStudy (aveline):

Plug in 0 for x and -4 for y.

OpenStudy (mnr134):

i think d

OpenStudy (mnr134):

no wait its c

OpenStudy (aveline):

It's C

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