Formula for Area and Their Shapes

Writing Decimals as Fractions

1. Write down the decimal divided by the number of places represented in the decimal . Example: 1.98
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2. Multiply both top and bottom by 10 for every number after the decimal point.

3. Reduce the fraction.

Squaring Numbers That End in 5.

• Take the first number and multiply it by the next number. Example: 7 (Multiply it by 8)
• After getting the multiplied number, add 25 to it. Example: 7 x 8= 64 (Add 25) The final answer is 5,625.

Average Rate of Change

The change in the y-value divided by the change in the x-value for two distinct points on the graph.

Function

A pairing of inputs with outputs such that each input has exactly one output.

Independent Variable

The "input" variable.

Zero of a Function

An x-value that makes a function equal to zero.

Parent Function

A set of data that has one distinct output for each input.

Parallel Lines

Two lines in the same plane that do not intersect.

Y-Intercept

The point where a graph crosses the y-axis.

Dependent Variable

The "output" variable.

Range

The output values of a function.

Absolute Value

The distance any number is from zero.

Perpendicular Lines

Two lines that intersect at a right angle.

Function Notation

A way of naming a function using f(x) instead of "y=".

X-Intercept

The point where the graph crosses the x-axis.

Absolute Value Function

A function that contains an absolute value expression.

Domain

The input values of a function.

Slope Intercept Form

A linear equation.

Written as: y=mx+b

Slope

The slant of a line:

M= (y2-y1)

       (x2-x1)