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Mathematics 15 Online
OpenStudy (anonymous):

Can Someone Tell Me if I Got Think Right? il Metal! Choose the graph below that correctly represents the equation 3x - 4y = 12.

OpenStudy (anonymous):

OpenStudy (anonymous):

OpenStudy (anonymous):

i chose the third on down cx

OpenStudy (acxbox22):

convert the equation to slope intercept form

OpenStudy (anonymous):

i did everything already i just wanted to know if i graphed it right

OpenStudy (anonymous):

it think its this one but i want to make sure

OpenStudy (shiraz14):

The correct answer is the fourth graph. Slope = 3/4; y-intercept = -3.

OpenStudy (acxbox22):

no the equation of the line is y=3/4x-3

OpenStudy (anonymous):

im confused /:

OpenStudy (anonymous):

@ganeshie8 could u help?

OpenStudy (shiraz14):

3x - 4y = 12 4y = 3x - 12 y = (3/4)x - 3

OpenStudy (anonymous):

i need help graphing.! not all of this ;-;

OpenStudy (anonymous):

@johnweldon1993 can you save me ?

OpenStudy (acxbox22):

The slope is 3/4 and the y intercept is (0,-3) NOW GRAPH IT YOU NEED THE EQUATION TO GRAPH

OpenStudy (anonymous):

please do yell at me again, i asked for help, not for you to be a douche. k? thanks

OpenStudy (acxbox22):

what? i am not yelling i am just saying that you cant just graph an equation in standard form so appreciate @shiraz14 's work

OpenStudy (johnweldon1993):

Alright so yeah 3x - 4y = 12 We need to represent this in terms of y. we want y = something...so subtract 3x from both sides... -4y = -3x + 12 and divide both sides by -4 y = (3/4)x - 3 So since this is in slope intercept form (y = mx + b) in THAT equation....'m' represents the slope of the graph...and 'b' represents the y-intercept (where the graph passes through the y-axis) So match that with your equation y = mx + b y = (3/4)x - 3 Looks like the slope = (3/4) and the y-intercept = -3 So we will have a graph that starts... |dw:1397842977330:dw| There The graph you chose...had the y-intercept at y = 3....not y = -3.... see where I'm getting that? @Courtneydyrdek98

OpenStudy (anonymous):

i hate math lol XD

OpenStudy (johnweldon1993):

And now...since the slope is \(\large \frac{3}{4}\) we know that slope= \(\large \frac{rise}{run}\) so you would go up 3 units.....and then to the right 4 units... Looks like graph D would be correct

OpenStudy (anonymous):

i have a question not having to deal with this

OpenStudy (johnweldon1993):

Shoot :)

OpenStudy (anonymous):

|dw:1397843207468:dw|

OpenStudy (anonymous):

this is a undefined slope right?

OpenStudy (johnweldon1993):

Correct...a vertical line has an infinite slope...thus undefined

OpenStudy (anonymous):

thank youu <3

OpenStudy (johnweldon1993):

Anytime :)

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