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Answers by Thomas E.

Percent Yield (answer)

Since the yield is 85%, we need to start with 45g/.85 = 52.9 g aspirin   (52.9 g C9H8O4)(1 mole C9H8O4 / 180 g C9H8O4)(1 mole C7H6O3 / 1 mole C9H8O4)(138.1 g C7H6O3 / 1 mole C7H6O3)   = 40.59

p = mn + b   59 = 3000n + b 64 = 2000n + b   and solve by either substitution or elimination  

linear function (answer)

A linear relationship means y=ax + b so set up a system of 2 equations in 2 variables.   -4 = a(-5) + b 0 = a(4) + b  and solve to get:   a = 4/9 and b = -16/9