The graph of y = 2x + 5 is drawn in red.
The following graphs are drawn in blue:
a) y = 5x + 2
b) y = 2x - 5
c) 2y + x = 7
d) 2y = 4x
e) y = 2(1 + x)
Which of the blue lines are parallel to the red line.
Which of the blue lines are perpendicular to the red line.
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b, d and e are parallel
c is perpendicular
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