Question

Solve the following system of equations using the graphing method.

Answer 1

y=x-5
y=-2x+1

Answer 2

Slope: -2 y-int: 1

Answer 3

And then hat do i do? D:

Answer 4

I will assume you know how to use a graphing calculator.

Put in those two equations then take a look at the graph.
See where they touch each other? You will have to find what that coordinate is.
To do this, press 2ND and TRACE. Go down to 5: Intersect. Press enter three times, and it will give you the coordinates at which those two lines intersect. It will say x=2 and that the answer to your equations.

Answer 5

>.> Um... I can't use a calculator.

Answer 6

Then in that case, graph the first equation, y=x-5.
-5 is the y-intercept, which means place a point at y=-5.
The slope is just a positive 1 so that just means go up one unit and go over to the right one unit, and place a dot. Connect the dots and that is your line for y=x-5.

Graph the next one, y=-2x+1. This one has a y-intercept of 1. Place a dot at y=1. The slope, though, is -2, which can be put as -2/1. You will have to go down 2 units, and one unit to the right, then place a dot. Connect the dots and that is your second line.

If you did this correctly, the two lines should intersect at the coordinate (2, -3).

Answer 7

I got -1,4?

Answer 8

?

Answer 9

Your graph should look like this.

Are you connecting your dots properly or using a ruler?

Answer 10

Let me try again.

Answer 11

Oh I see (:

Answer 12

So if the equations are y-2x=4 and 3y=6x-3

Answer 13

The y-2x=4 y change to y=2x+4.

Answer 14

Right?

Answer 15

?

Answer 16

That would mean solving it so that it is in y=mx+b form so yes, that is correct.

Answer 17

okay.

Answer 18

No solution

Answer 19

Aren't they parallel?

Answer 20

btw wouldn't it y=2x-1?

Answer 21

6/3 is 2

Answer 22

y=x-5
y=-2x+1

x-5 = -2x +1
Solve for x, this is the same as finding pt. of intersection on calulator

Answer 23

><'' I can't use calculators...

Answer 24

I didn't tell you too use a calculator, I said, solve for x.

Answer 25

Yes, it should be y=2x-1. Sorry about that!

Answer 26

And yes, they are parallel. You can tell by the equation also. y=2x+4 and y=2x-1.
The slopes are the same.

Answer 27

yay! Thank you.