Question

Which of the following simultaneous equations is not parallel to the other 3?

A. -2x = 3+y
B. y = 5-2x
C. x = 1/2y + 6
D. X = -1/2y

Answer 1

Convert all the answer choices to slope-intercept form for direct comparison: y = mx + b. To do this you need to isolate y; for example, B is already in slope-intercept form. Your answer would be the one equation with a differing slope, since parallel lines all have the same slope.

Answer 2

actually, for B to be in y=mx + b form you just need to invert the terms, so y = 5 - 2x is y = -2x +5

Answer 3

Do you get how to do it?

Answer 4

Yeah, the answer is b right?

Answer 5

I just didn't put them onto a graph haha

Answer 6

No, it isn't actually, since A is y = -2x + 3 . A and B have the same slope of -2 so neither can be your answer. All you need to do is find out whether C or D have a different slope and the answer choice that does not have a slope of -2 in y = mx + b form is your answer.

Answer 7

Ok, thank you!

Answer 8

No problem