Question

Select the equations that are parallel and perpendicular to y = -3x - 1 and that pass through the point (3, 1).

parallel: y = -3x + 6
perpendicular: y =1/3 x + 2 2/3

parallel: y = -3x + 10
perpendicular: y =1/3 x

parallel: y = -1/3 x
perpendicular: y = -3x

parallel: y = 1/3x + 1
perpendicular: y = 3x - 1

Answer 1

Parallel lines will have the same slope. In slope intercept form (y=mx+b), "m" is the slope. You can eliminate two choices quickly.

Answer 2

ok

Answer 3

and then just plug in the points to see which of the two works

Answer 4

So which two are eliminated?

Answer 5

c,d right?

Answer 6

Yes, now you can plug 3 in for "x" in the remaining two parallel functions and see which one gives you a result of 1.

Answer 7

ok one sec

Answer 8

If the parallel function checks out, test 3 in the perpendicular function and just make sure you still get 1 back. Just to be thorough.

Answer 9

B right?

Answer 10

You'd be correct.

Answer 11

Wow thanks for going though it with me :P

Answer 12

np