Question

Graph equation
x+y=5
Do you graph all points that make the equation true?

Answer 1

no. all you need are two points to draw a line so just find two (x, y) pairs and draw a line through those two points.

For your equation, x + y = 5,
if x = 0, then y = 5. So (0, 5) is a point on the line. also, if y = 0, then x = 5 so (5, 0) is also a point on the line. Now graph these two points and draw a line through them. that will give you the graph of the equation.

Notice I choose "easy" points. You should do that in all your equations when you can.

Answer 2

technically speaking, drawing the line IS drawing all points that make the equation true.

Answer 3

So start with the easy points ok . now some of my problems have been making me enter 4 or 5 points in that case how do i know which ones to use

Answer 4

i choose the (0, 5) and (5, 0) because if you look at your equation, 0 is the easiest to calculate the other variable. First I let x=0 to find y for the first point and for the second I let y=0 to find x for the other point. Make it easy on yourself. The other points are just to verify that your doing your calculations correctly, maybe.

Answer 5

ok thanks so much

Answer 6

np