Question

The line passing through points (-1, 7) and (-1, 3) is:
a. vertical
b. horizontal
c. increasing
d. decreasing

Answer 1

first determine slope aka (y2-y1)/(x2-x1)

Answer 2

See, here x coordinates are not changing ie -1 and -1 in both the points..
Only the y coordinates are chanigng..

So, line having x coordinates same and y coordinates changing will be parallel to y-axis..



So what will be your answer??

Answer 3

Use the slope formula. If it's 0, then it's horizontal. If it's undefined, it's a vertical line.

Answer 4

Vertical?

Answer 5

Yes, you are correct...

Answer 6

Thank you!

Answer 7

np :)

Answer 8

Wish I could have given more than one medal!