Question

Which of the following is the equation of the vertical line that passes through (4,6)?
A. y = 6
B. y = 4
C. x = 6
D. x = 4

Answer 1

what DOESN'T change in a vertical line?

the x or the y?

Answer 2

x

Answer 3

exactly... so no matter what y is, x always must be ?

Answer 4

0

Answer 5

no, look at the given point. what is the x value?

Answer 6

oh sorry 4

Answer 7

yes!!!

so no matter what y is, the value of x is always ?

Answer 8

4

Answer 9

and how would you write such a thing?

Answer 10

in an equation sort of way?

Answer 11

x=4

Answer 12

perfecto!!! you are the master!

Answer 13

thank you

Answer 14

you are welcome! happy new year!

Answer 15

thanks you too

Answer 16

Every point on the graph has x-coordinate 4.
The equation x = 4 means the only thing to consider is the x-coordinate of every point must be 4. No matter what y-value you have, x must be 4. y is so forgotten, it is actually left out of the equation.