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Plz Check My Geometry

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Out of 30 questions these few I struggled with. I put what I feel was right but to be sure I would like some one to check my answers and if there wrong redirect me on how to get the correct answer.( after the = is the answer i think it is.

1.) Given points A(-4, 5), B(2, 3), C(0, 4) and D(5, 0), decide if AB and CD are parallel, perpendicular or neither.
=Neither

2.)Given the equations y = 1x + 7 and y = 3x - 2, decide whether the lines are parallel, perpendicular or neither.
=neither

3.) Given the equations y = 4/3x - 3 and y = -3/4x + 2, decide whether the lines are parallel, perpendicular, or neither.
=Perpendicular

4.) Which set of points are collinear?{options being A(-1,5); B(2,6); C(4,7), A(0,0); B(1/2,3); C(1,5), A(-4,-2); B(0,-4); C(2,-5)
= A(-4,-2); B(0,-4); C(2,-5)

5.) Choose whether the lines given below are parallel, perpendicular or neither.4x - 6y = 9; 3y - 2x = 7j
= neither

6.) Choose whether the lines given below are parallel, perpendicular or neither.
4x - 6y = 9; 4y + 6x = 12
=perpendicular

7.) Choose whether the lines given below are parallel, perpendicular or neither.4x - 6y = 9; 3x - 2y = 11
=neither

8.) Triangle ΔABC has vertices A(2,5), B(8,1) and C(-2,-1) and is a right triangle. If the slope of AB is -2/3 and the slope of AC is 3/2, are the lines parallel, perpendicular or neither?
=perpendicular

  • Plz Check My Geometry - ,

    I caught #5

    first equation : 4x - 6y = 9
    multiply 2nd by -2 ---> 4x - 6y = 14j
    what do you think now?

  • Plz Check My Geometry - ,

    perpendicular

  • Plz Check My Geometry - ,

    no, aren't their slopes equal ??

    4x - 6y = ?????
    the slope is 2/3, the constant on the right side does not matter.

  • Plz Check My Geometry - ,

    oh ok

  • Plz Check My Geometry - ,

    lol

  • Plz Check My Geometry - ,

    Choose whether the lines given below are parallel, perpendicular or neither.

  • Plz Check My Geometry - ,

    Determine whether the lines are perpendicular, parallel or neither.
    -x+2y= -2
    2x-4y= 3

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