Question

solve the equation by graphing :

y=6
y=4/3x+2

Answer 1

no idea how to do this.

Answer 2

In order to solve this problem, you'll need to know the following:

1. How to plot lines on an xy plane
2. How find the intersection point of two lines
3. How to plot points on an xy plane

Which of the following are you having trouble with?

Answer 3

In this instance, you would graph the line y = 6 as well as y = 4/3x+2.

The point of intersection should be the solution.

Answer 4

@hero 2 and 3

Answer 5

So, what you're telling me is you've plotted both lines on the xy plane, however, you haven't noticed that they intersect, correct?

Answer 6

how do i plot the second one?

Answer 7

In graphing, the intersection is when the two lines cross. If you correctly graph the lines and the intersection point is an integer, you can find where they intersect.

to graph the second equation, when x=0, y = 2. So the y intercept is (0,2). That's one point. To plot the rest of the line, you go over 3, up 4, plot point, connect etc.

Answer 8

wombat, I know you're trying to help, but it is less confusing if one person tries to help her at a time.

Answer 9

@hero so for the first equation i plot (0,6)? correct

Answer 10

Just to clarify, y = 6 is a line, not a point. When you plot y = 6, you consider all the points on an xy plane that have the coordinate (x,6)

Answer 11

so its a horizontal line crossing the axis at (0,6)?

Answer 12

Yes, correct

Answer 13

okay so about the other equation how do i do that one??

Answer 14

To plot the other line, you'll need to plot two points that represent the x-intercept and the y-intercept of that line. In other words, one of the points will intersect the x-axis. The other point will intersect the y-axis.

To find the x-intercept, set y = 0 then solve for x
To find the y-intercept, set x= 0, then solve for y

Answer 15

so 0=4/3x+2 is x intercept ?

Answer 16

For the x-intercept, you'll end up with some point (x,0)
For the y-intercept, you'll end up with some point (0,y)

Answer 17

jenny, when I say "solve for x" I mean to isolate x on one side of the equation such that it is by itself on one side of the equation.

We need an equation where

x = some number

You'll need to use your knowledge of algebra to manipulate that equation to get x alone.

Answer 18

If you need help doing this, please say something.

Answer 19

yes i need help

Answer 20

Jenni, you've never solved an equation for x before?

Answer 21

Suppose you had

3x + 5 = 17

and you had to find x, what would you do?

Answer 22

Do you still need help?

Answer 23

I'm still helping her.

Answer 24

Ok Ok Ok.

Answer 25

you take 5 from both sides to get 3x=12
then divide both sides to get x by itself
to get x=4