math
posted by chatis .
How to graph the following problems on a graph.
1. y= 2x+5
2. 2x+ 3y= 8
3. y= 3x5
4. 4y= 2x9

It's hard to show here the actual graph so I'll just tell you what to do. There are plenty of ways to graph them, but this is, for me, the simplest:
1. First, find the x and yintercepts.
To the xintercept, let y = 0 and solve for x. To find the yintercept, let x = 0 and solve for y.
2. Then plot the points on a Cartersian plane.
3. Draw a line connecting the two points, and you have the graph!
Let's take the first equation as example: y = 2x + 5.
For the xintercept, (let y=0)
0 = 2x + 5
2x = 5
x = 5/2
Thus the point is (5/2, 0)
For the yintercept, (let x=0)
y = 2(0) + 5
y = 0 + 5
y = 5
Thus the point is (0, 5)
Then get a graphing paper and plot these points, and connect them with a line.
Hope this helps~ :3