Which of the following pairs of equations represent parallel lines?
20 points
y = 4x - 3 and y = - 4x -5
y = 3/5 x and y = -5/3 x -1
y = 10x + 7 and y = 10x -1
y = - 2x + 6 and y = - 2x + 6
which of the following pairs of equations represent perpendicular lines?
20 points
y = 5x and y = - 5x
y = 9/4 x +11 and y = - 4/9 x +11
y = 8 and y = 2
y = 1/2 x + 5 and y = 2x - 4
which of the following equations represents a horizontal line?
20 points
y = 15
x = -22
y = x
y = 3x - 7
which of the following equations represents a vertical line?
20 points
y = 0
y = 1/2 x
x = 10y +25
x = - 3
which of the following equations represents direct variation?
20 points
5y = 2x
10x = 5
2y = - 2
6x - 7y = 1