exam Maths Puzzle Numerical Ability

y=2x-7
3x-4y=8
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Question 4

National Bi polar products (NBP) ltd manufactures and also sells two products. The demand function of each of the two products depend on the price of the two products What does my teacher mean when she says "Tell how each of the following may be graphed by "shifting" the graph of y=/x/. Then sketch the graph for each."
y = /x + 2/ - 1
y = /x - 3/ - 2
y = /x - 1/ + 2
y = -/x + 2/ + 1