#### Math - 2018-19

# AII.9 - Linear and Quadratic Regressions

AII.9The student willcollectandanalyzedata,determinethe equation of the curve of best fit in order tomake predictions, andsolvepractical problems, using mathematical models of (linear and) quadratic~~and exponential~~functions.

*Adopted: 2016*

### BIG IDEAS

- I can make accurate
predictions about future events, make millions of dollars, predict the end of
the world, and always cheer for the winning team.

- I will describe relationships
between variables using graphical models, be able to predict values and
outcomes, and determine whether relationships are linear or non-linear.

### UNDERSTANDING THE STANDARD

· Data and scatterplots may indicate patterns that can be modeled with an algebraic equation.

· The curve of best fit for the relationship among a set of data points can be used to make predictions where appropriate.

· Knowledge of transformational graphing using parent functions can be used to verify a mathematical model from a scatterplot that approximates the data.

· Graphing utilities can be used to collect, organize, represent, and generate an equation of a curve of best fit for a set of data.

· Data that fit quadratic (), and exponential () models arise from practical situations.

· Rounding that occurs during intermediate steps of problem solving may reduce the accuracy of the final answer.

· Evaluation of the reasonableness of a mathematical model of a practical situation involves asking questions including:

“Is there another curve (quadratic or exponential) that better fits the data?”

“Does the curve of best fit make sense?”

“Could the curve of best fit be used to make reasonable predictions?”### ESSENTIALS

**The student will use problem solving, mathematical communication, mathematical reasoning, connections, and representations to**

· AII.9_{1} **Determine**
an equation of the curve of best fit, using a graphing utility, given a set of
no more than 20 data points in a table, graph, or practical situation.

· AII.9_{2} **Make
predictions**, using data, scatterplots, or the equation of the curve of best
fit.

·
AII.9_{3} **Solve**
practical problems involving an equation of the curve of best fit.

·
AII.9_{4} **Evaluate**
the reasonableness of a mathematical model of a practical situation.

### KEY VOCABULARY

curve
of best fit, mathematical model, polynomial, exponential, logarithmic,
scatterplots, polynomial, exponential, logarithmic, predictions

*Updated: Aug 23, 2018*