graph the equation :
1. 8y= -2x+20
2. x=45x+75
3. f=9/5C+32
2006-10-09 09:37:37 · 6 answers · asked by pearl 2 in Science & Mathematics ➔ Mathematics
Choose any two values of x (or C, for #3) and compute the corresponding values of y (or F). For simplicity, let one of those values be 0.
Then, you get two points that you can plot on your graph. Draw a horizontal line for your x-axis, then a vertical line passing through it for your y-axis. The intersection of these lines is the point (0,0), the origin. To plot a point (x,y), go x units to the right of the origin (or left, if x is negative), and then y units up (or down, if y is negative), and that's where the point goes.
All of these functions are linear functions, so the graph is a straight line. After plotting two points, you can just draw a straight line that passes through them, and that's your graph.
2006-10-09 09:43:51 · answer #1 · answered by James L 5 · 2⤊ 0⤋
Damn!! You should have learned this in Algebra 1.
8y = -2x + 20 => y = -(1/4)x + 20/8
-1/4 is the slope, and 20/8 is the y intercept. Put a point at 20/8 on the y axis. Now go 4 units to the right and one unit down. Place another point there. Connect the points with a straight line and extend the line to the edges of the graph.
You do the other ones âº
Doug
2006-10-09 16:45:28 · answer #2 · answered by doug_donaghue 7 · 1⤊ 0⤋
1) y = -x/4 + 5/2
2) x = -1.70
I have simplified the first two for you, but do you really expect someone to graph them for you?
2006-10-09 16:41:43 · answer #3 · answered by عبد الله (ドラゴン) 5 · 0⤊ 0⤋
Find the x & y intercepts for each one, then graf it. they are all linear equations.
2006-10-09 16:48:16 · answer #4 · answered by ? 5 · 1⤊ 0⤋
Go to Math.com
2006-10-09 16:40:02 · answer #5 · answered by Amy C 2 · 0⤊ 1⤋
Ummm....then graph it
2006-10-09 16:39:29 · answer #6 · answered by Mariko 4 · 1⤊ 1⤋