# Precalculus 1.4-1.7 Test Outline

From Huben's Wiki

1.4 Shifting, Reflecting, and Stretching Graphs

- Know and recognize the six commonest parent functions.
- Know how to modify a function by changing inputs and outputs to:
- shift it horizontally or vertically
- reflect it around the x-axis or y-axis
- stretch or shrink vertically or horizontally

- Recognize modifications to parent functions and write their equations.

1.5 Combinations of Functions

- Add, subtract, multiply, divide, and compose functions.
- notation
- how to find the rules
- evaluating

- Is composition commutative? If it is, when?

1.6 Inverse functions

- Be able to explain what an inverse function does.
- Verifying inverses algebraically and graphically.
- Testing if an inverse function exisits.
- Find inverse functions algebraically.

1.7 Linear Models and Scatter Plots

- Identify correlations as positive, negative, or neither.
- Understand what "least squares regression" means.
- Fit lines to data with your calculator, finding the correlation coefficient.
- Make predictions from the fitted line.