Functional Relationships: Sample Problems

Try each one on paper first. Only then reveal the solution — reading a worked answer you never attempted teaches you almost nothing.

1. 1. A gas at fixed temperature has its volume cut in half. What happens to the pressure, and what relationship is that?

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2. 2. Data: (1, 3), (2, 6), (3, 9). Name the relationship and write an equation.

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3. 3. For rate = k[A]², what happens to the rate if [A] triples?

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Al says…

Test data points in your head. Double x: if y doubles it's direct, if y halves it's inverse, if y quarters it's inverse square, if y quadruples it's a parabola.