KEY CONCEPT A population is an entire group of objects-people, animals, plants-from which data can be collected. A sample is a subset of the population. When you ask a statistical question about a population, it is often more efficient to gather data from a sample of the population. 忡 A representative sample of a population has the same characteristics as the population. Generating a random sample is one reliable way to produce a representative sample of a population. You can generate multiple random samples that are different but that are each representative of the population. Do You Understand? Do 1. Essential Question How can you determine a representative sample of a population? 4. A wh sa 50 of 2. Construct Arguments Why does a sample need to be representative of a population? 5. A IMP3 wh na ne at

Equations and inequalities describe the relationship between two mathematical expressions.

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.