Question

Which group of points are all on the line y = -2x + 1?

Answer 1

A (3, –5); (1, –1); (2, –3) B(3, –7); (1, –3); ( 2, –3)
C (3, –7); (1, –1); ( 2, –5) D(3, –5); (1, –3); (2, –5)

Answer 2

Any ideas where to start?

Answer 3

nopee

Answer 4

Let's say that choice C was the answer (this is hypothetical for now since we don't know yet)

If it was, then (3, –7), (1, –1), and ( 2, –5) would be solutions


If (3,-7) was a solution, then x = 3 and y = -7, so...

y = -2x + 1

-7 = -2(3) + 1

-7 = -6 + 1

-7 = -5 ... which is false. So (3, –7) is NOT a solution, which means choice C is NOT the answer.


Do the same with the other answer choices to see if those points are solutions.