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            My Algebra Reminders Summary

Section 3: Introduction to Functions

Topic 1: Input and Output Values

Domain is the set of independent values of 𝑥 used for the input of the function. Range is the set of dependent values of 𝑦 calculated from the domain for the output of the function.

Range is the independent values of y used for the input of the function.

Every x only corresponds with one y

Topic 2: Representing, Naming, and Evaluating Functions

The letter inside the parentesis is the variable

The number inside the parentesis replaces X




Topic 3: Adding and Subtracting Functions

When adding or subtracting functions exponents do not change.

You cannot add or subtract a squared number by a normal number

When multiplying a normal number the exponent bumps up by 1 if the number is squared

Topic 4: Multiplying Functions

Order numbers from greatest to least on the multiplying square

Even though it has a exponent,0 times 0 is always going to be zero







Topic 7: Key Features of Graphs of Functions – Part 1

Every input value (x) corresponds to only one output value (y)

Vertical line test

If the line crosses the function twice,it is not a function

Topic 8: Key Features of Graphs of Functions – Part 2

As the x values increase,y values increase (increasing intervals)

As the x value increases,y value decreases (decreasing intervals)

The point on the graph where the interval changes from increasing to decreasing (relative maximum)


The point on the graph where the interval changes from decreasing to increasing (relative minimum)

Topic 9: Average Rate of Change Over an Interval










Topic 10: Transformations of Functions