parallel+lines+Set+6

Which of the following Linear Functions are parallel? 1. y=2/3x+4 2. y=3/4x-2 3. y=3/2x+3 4. y=6x+9 5. y=6/8x+3

Numbers One and Five are parallel because they have the same slopes. What??!! 2/3 and 3/4???

This is a great question -- for sixth graders!!! What about a question that is like one I would put on the exam? At least something that doesn't just give the equations in slope - intercept form!!

Perhaps something like : give the equation of the line that is parallel to the median from vertex A of triangle ABC but passes through point B, provided that A has coordinates (0, 4), B has coordinates (5, 11) and C has coordinates ( 11, -7).

Or what about asking which of these are parallel, which are perpendicular, or neither:

1. 4x + 3y = 7

2. (4/3)y = 9- x

3. y - 3 = (-4/3) (x + 7)

SAM HEYMAN 3y=-4x+7 y=-4x/3+ 7

4/3y=9-x -3/4x+9=y

-4/3x+ 7*-4/3= y-3

numbers 1 and 2 are perpendicular numbers 1 and 3 are parralel