Question

What is the equation of a horizontal line passing through the point (2, 10)?

Answer 1

What's another point on this line?

Answer 2

the answer is 10 because
You choose additional coordinate on the line like (4,10) and (7,10)
Notice that every one of those points has its
y coordinate equal to 10. You can also see
that no matter how many points we get on that
line, every one of them will have 10 for its
y-coordinate.
That's the answer.
http://www.algebra.com/algebra/homework/Pythagorean-theorem/Pythagorean-theorem.faq.question.125495.html

Answer 3

lol I answered my own question