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Mathematics 20 Online
OpenStudy (anonymous):

3x-y=0

OpenStudy (anonymous):

what do you need to do? solve for y?

OpenStudy (anonymous):

if so, simply bring the -y to the RHS and it will become y. now what will the final equation be?

OpenStudy (anonymous):

graph 3x+y =0

OpenStudy (anonymous):

but u wrote 3x-y=0?

OpenStudy (anonymous):

sorry i typed wrong number earlier 3x+y=0

OpenStudy (anonymous):

put it in y = mx+b format 3x+y = 0 y = -3x post what you think m and b are.

OpenStudy (anonymous):

m=-3 b=1 ?

OpenStudy (anonymous):

m=3

OpenStudy (anonymous):

you got the m correct the first time(-3). however, our b is 0. it is not present in our y = mx+b equation.

OpenStudy (anonymous):

how would i graph the set with 2 plot

OpenStudy (anonymous):

y=-3x so we figured that out. It's a linear line, figured out that by looking at the power of x which is one. find the x and y-intercepts if any first, and then just connect a line through them after you plotted the two points.

OpenStudy (anonymous):

how

OpenStudy (anonymous):

Hint: y=x is just a straight line in the basic form. y=-x inverse of the straight line in the basic form y=-3x is a dilation by -3 in the y-axis.

OpenStudy (anonymous):

the y axis intercept is found by setting x =0 the x axis intercept is found by setting y = 0

OpenStudy (anonymous):

would it be a straight line

OpenStudy (anonymous):

yes, the slope is constant.

OpenStudy (anonymous):

this might help you visualize it. http://www.wolframalpha.com/input/?i=y+%3D+-3x

OpenStudy (anonymous):

y = -3x to find the y intercept set the x value to 0. y = -3(0) y = 0 you have your y intercept at (0,0) same for your x intercept which is at (0,0).

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