Question

write an equation of the line that passes through the given points.
(-1,3), (2,9)

9-3
----
2+1 = 6/3=2

y=2x
is this correct?

Answer 1

no u r not right
easy to check
if u put -1 in ur line's equation u must get 3 but u r getting -2 so add 5 to ur equation.

Answer 2

actually u have missed the intercept part:/

Answer 3

y=mx+c
y=2x+5.

Answer 4

now this is correct:)

Answer 5

could you arrange it so i could understand better..

Answer 6

y - y1 = m ( x - x1)

Answer 7

y = 2x is wrong
u must add intercept here
if u calculate easily in my first comment as i said above u would get intercept as 5
so ur equation will become
y= 2x+5
now this is right:)
gt it ?

Answer 8

http://www.wolframalpha.com/input/?i=y%3D+2x%2B5