Question 9. 9. Select the pair of equations whose graphs are perpendicular.
(Points : 5)
5x – 8y = 9
12x – 5y = 7

x + 6y = 8
y = 2x – 8

y = 2x – 7
x + 2y = 3

2y = –3x + 5
2x + 3y = 4

Question 10. 10. Which is the equation of the line passing through (0, 6) and (3, 0)?
(Points : 5)

Question

Question 9. 9. Select the pair of equations whose graphs are perpendicular.
(Points : 5) 
        5x – 8y = 9
             12x – 5y = 7

        x + 6y = 8
             y = 2x – 8

        y = 2x – 7
             x + 2y = 3

        2y = –3x + 5
             2x + 3y = 4


Question 10. 10. Which is the equation of the line passing through (0, 6) and (3, 0)? 
(Points : 5)

anonymous · Answer

When you multiply the slopes of the two lines you should get -1. So the third equation appears to be the correct answer.

y= 2x-7 So slope is 2

x+ 2y = 3 or y= -x/2 +3 So slope is -1/2

(-1/2)(2) = -1