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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