Algebra II Pre-Test

A function is a relation where each input (x-value) has exactly one output (y-value).

The domain is the set of all possible input values (x-values) for which the function is defined.

The range is the set of all possible output values (y-values) that a function can produce.

A relation is a function if no x-value is paired with more than one y-value.

A Z-score measures how many standard deviations an element is from the mean of a data set.

Z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.

The formula is y = a(1 - r)^t, where a is the initial amount, r is the decay rate, and t is time.

Exponential growth increases over time, while exponential decay decreases over time.

Standard deviation measures the amount of variation or dispersion of a set of values.

The mean is the average of a set of numbers, representing the central value.