Question

What is the equation of the line containing the points (7, 3), (14, 6), and (21, 9)?

A. y = 3/7x
B. y = x - 4
C. y =1/7 x

i haven't even seen a question like this before.

Answer 1

i am just so confused

Answer 2

Super easy question. All you gotta do is to find the slope of the coordinates they gave you
pick 2 points out of the 3 they gave you let's say
(14,6) (21,9) and find the slope using the slope formula
\[\frac{ y2-y1 }{ x2-x1 }\]
substitute the right values in the right positions
\[\frac{9-6 }{ 21-14 }\] which would equal 3/7
now see which equation has a slope of 3/7?
it is the 1st one
y = 3/7x

Answer 3

any questions?

Answer 4

no thank you :)