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Mathematics 16 Online
OpenStudy (diamond77108):

plzzz hepl will medal and fan!!!!! Make a table of ordered pairs for the equation. y=12x−3

OpenStudy (rachel.frank40):

So for this you are going to choose values to plug in for x and then plug them in and find y. For example if x=0 then you plug it into the equation and get \[y=12\times0-3\] So y=-3 and you can start a table X Y 0 -3 1 9 2 21 3 33 To get the other values you just plug the x into the equation and simplify.

OpenStudy (diamond77108):

im sorry that that was suposed to be \[\frac{ 1 }{ 2}\]

OpenStudy (diamond77108):

not 12

OpenStudy (rachel.frank40):

Ok, so it it is \[\frac{ 1 }{ 2 }\] You will wan to choose all even numbers for the x-values so that you don't have to deal with fractions or decimals in your answers. So start with 0, because it is easiest. \[y=\frac{ 1 }{ 2 }\times0-3\] Which is still going to be -3. And that starts your table X Y 0 -3 2 -2 4 -1 6 0

OpenStudy (diamond77108):

this s the question who do i graph that

OpenStudy (diamond77108):

that what i thin the answer is an i right

OpenStudy (rachel.frank40):

You have the y-intercept (where the line goes through the up and down axis) correct, however the spot for the line going through the x-axis (the one that goes left and right) is not in the right spot. Look at the table again and see where y=0 and that will show you the value where the line should go through the x-axis.

OpenStudy (diamond77108):

this

OpenStudy (rachel.frank40):

So the point you have at (0,-3) is correct. Now try plotting the other point that has a zero in it, because the line should not be just up and down.

OpenStudy (diamond77108):

OpenStudy (rachel.frank40):

So you have put a point at (0,0), but look at the table, that is not one of the points on the table. You want to look at the point (6,0)

OpenStudy (diamond77108):

so graph (6,0)

OpenStudy (rachel.frank40):

Yes, that point along with the point (0,-3) are the more important ones on the graph. Whenever there is a 0 in the ordered pair it means that that point is important.

OpenStudy (diamond77108):

OpenStudy (diamond77108):

that

OpenStudy (rachel.frank40):

Ok, now just get rid of the point at (0,0) because that is not part of the line and you should then have the line you need.

OpenStudy (diamond77108):

this

OpenStudy (rachel.frank40):

There you go!

OpenStudy (diamond77108):

can u check this other question for me

OpenStudy (rachel.frank40):

sure

OpenStudy (diamond77108):

OpenStudy (rachel.frank40):

So the equation is \[y=-\frac{ 1 }{ 2 }x-4\] So you want to start with plugging in x=0 and you will get \[y=-\frac{ 1 }{ 2 }\times0-4\] so y=-4 Which makes the point (0,-4). Now do you have that point on this graph? Look at the dign carefully.

OpenStudy (rachel.frank40):

*sign

OpenStudy (diamond77108):

OpenStudy (urturn):

You got a kik

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