A supply curve;
(a) Shifts to the right when price increases.
(b) Shifts to the right when an input price (e.g. wages) decreases.
(c) Never shifts but slopes downwards because firms can sell more products when prices fall.
(d) Both (a) and (b) are true.
Ans: (b) Shifts to the right when an input price (e.g. wages) decreases.
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