Question

geometry help!!

Answer 1

which of the following equations is parallel to the line passing through a(-2 7) b(-2 -2)

Answer 2

Are you going to type in the choices?

If you noticed that (-2, 7) and (-2, -2) have the same x value. Therefore you can conclude something about this line. What is it?

Answer 3

the choices are
y=-2
y=x
3x=5
-2x=7y

Answer 4

What can you conclude about a line that has two points on it with the same x value?

Answer 5

i dont know i am really bad at math

Answer 6

It means the line is parallel to the y axis. The x value is always the same on this line. You can even say the equation of the line joining points a and b is: x = -2.

Answer 7

If you go through the choices you will see one equation where x always stays the same. That line is also parallel to the y axis and therefore parallel to the original line ab.

Which one has the same value for x among the 4 choices?

Answer 8

b?

Answer 9

Not b. There y = x. It means when x = 6, y = 6, x = 8, y = 8. So the x and y value keep changing. It will be a 45 degree line if you graph y = x.

The first one had y always equal -2. So it will be parallel to the x axis.

But we are looking for an equation where x is always the same.

If you look at 3) 3x = 5
Divide both sides by 3
x = 5/3.
So the x always stays at 3/5 for this line. It is a line parallel to the y axis and therefore parallel to our original line ab which was also parallel to the y axis.

So the third choice is our answer.

Answer 10

thank you