exam Maths Puzzle Numerical Ability

How would I graph the following equations: (a) y = 1/3x + 1 (b) y = -3x + 1 (c) y = 3x + 1 (d) y = -1/3x + 1?

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exam Other Question

Determine which two equations represent parallel lines.
(a) y = x + 4
(b) y = x - 7
(c) y = 2x + 8 (d) y = 2x - 4 I=Prt I do not understand this question, I hope someone can figure this out for me. Thanks!