Study Guide G11 ~ Mathematical Literacy
Unit
2
Lesson 2: Patterns with constant relationships VARIABLES Variables are values that can change. The independent variable is the value that is shown on the 𝑥𝑥-axis. It is independent from the dependent variable and is not affected by other variables. For example, time is always an independent variable. It changes as time passes, without it being affected by something else or being dependent on something. The dependent variable is the value that is shown on the 𝑦𝑦-axis. It is determined by the independent variable. TYPES OF VARIABLES Discrete values consist of whole numbers, for example, the number of people standing in a queue, the number of apples in a bag, days of the week. These are values that are not used as fractions in context. Discrete values are indicated by points (dots) which can be connected by dotted lines.
Continuous values consist of fractions (common or decimal fractions), for example, length, weight, age. Continuous values are indicated by solid lines because the values between the points are also included.
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