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2007-09-21 16:41:16 · 6 answers · asked by yeahyeahyeah 4 in Science & Mathematics Mathematics

6 answers

you can make a table of values or use slope and intercept to graph

Table Method, pick some x's and solve to find y
y = 3/4x + 2
When you have a fraction for the slope it is best to pick x's that are multiples of the denominator.
if x = 0 y = 3/4(0) + 2, y = 2
the point is (0, 2)
if x = 4, y = 3/4(4) + 2, y = 5
the point is (4, 5)
and so on...


Slope/Intercept Method
Plot the y - intercept which is (0, b) --> y = mx + b
In this example it is (0, 2)
From this point apply the slope 3/4 to plot a few more points.
You go up 3 and over 4 and plot a point, and repeat ...

2007-09-21 16:49:46 · answer #1 · answered by sfroggy5 6 · 0 0

for any graph like this, the number that x is multiplied by is the slope, and the constant that is added or subtracted is the y-intercept of the graph.

Two easy ways to plot it: start at the point x=0, y=2 (the intercept), and go over 1 in the x direction and up 3/4 in the y direction (use the slope).

Or, pick any number you want x to be. Plug it into the equation, and you will get the y that goes with that x. For example, use 4 for x and get (3/4)*4+2 = 5. So (4,5) is a point on the graph. Do it again for any other x you want, and draw the line between them. Most people pick x=0 and x=1, because that makes it very easy.

2007-09-21 16:57:29 · answer #2 · answered by bagalagalaga 5 · 0 0

Well, it will be a straight line. The +2 is the y-intercept so the line will cross the y-axis at 2.

The 3/4 is the slope of the line. You can start plotting points. For every 4 in the x-direction (horizontal), the line rises 3 in the y-direction.

So you'll end up with a line climbs from left to right and intercepts the y-axis at 2.

2007-09-21 16:52:48 · answer #3 · answered by Eric P 6 · 0 0

3/4 is the slope (which is rise/run, aka y/x), and 2 is the y intercept.

So on the y-axis, plot (0,2). Then from (0,2) go up 3 and 4 across right to point (3,4), then up 3 and 2 across to (6,8) and etc.

Going down 3 and 4 across left will have show the same line too. Hope this helps :)

2007-09-21 16:48:49 · answer #4 · answered by gotthatswing 2 · 0 0

You go up 2 on the y axis. Plot that point, Then go up 3 points from that point and go to the right 4 points and plot that point. Then draw a line through the two points.

2007-09-21 16:51:23 · answer #5 · answered by meekyle22 3 · 0 0

y = (3 / 4) x + 2 is required equation.
To draw a line, 2 points are required.
(0 , 2) and (8 , 8) are suitable.
A line may be drawn thro` these points.

2007-09-22 04:24:01 · answer #6 · answered by Como 7 · 2 0

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