A comparison of two quantities.

A statement that two ratios are equal.

y varies directly as x if there exists a real number k such that y = kx.

Describes how a quantity is changing over time.

The ratio of the change in y to the change in x along a line is called the slope of the line.

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FOCA_1.5

Vocabulary for FOCA_1.5

Term	Definition
ratio	A comparison of two quantities.
proportion	A statement that two ratios are equal.
direct variation	y varies directly as x if there exists a real number k such that y = kx.
rate of change	Describes how a quantity is changing over time.
slope	The ratio of the change in y to the change in x along a line is called the slope of the line.