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The graph below shows the price (in cents) of a first-class stamp since 1917. Source: United States Postal Service (a) Estimate the absolute increase in the price of a first-class stamp from 1992 to 2007. (i) 10% (ii) $0.10 (iii) 25% (iv) $0.14 (v) $0.25 (vi) 33% (b) Estimate the relative increase in the price of a first-class stamp from 1992 ... ................
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