Let's practice writing verbal descriptions of functional relationships.

**TEKS Standards and Student Expectations**

**A(2)** Linear functions, equations, and inequalities. The student applies the mathematical process standards when using properties of linear functions to write and represent in multiple ways, with and without technology, linear equations, inequalities, and systems of equations. The student is expected to:

**A(2)(C)** write linear equations in two variables given a table of values, a graph, and a verbal description

**A(4)** Linear functions, equations, and inequalities. The student applies the mathematical process standards to formulate statistical relationships and evaluate their reasonableness based on real-world data. The student is expected to:

**A(4)(C)** write, with and without technology, linear functions that provide a reasonable fit to data to estimate solutions and make predictions for real-world problems

**A(8) **Quadratic functions and equations. The student applies the mathematical process standards to solve, with and without technology, quadratic equations and evaluate the reasonableness of their solutions. The student formulates statistical relationships and evaluates their reasonableness based on real-world data. The student is expected to:

**A(8)(B) **write, using technology, quadratic functions that provide a reasonable fit to data to estimate solutions and make predictions for real-world problems

**Resource Objective(s)**

Verbally describe the functional relationship that exists when given a problem situation.

**Essential Questions**

How can you tell if a situation is linear or quadratic?

Why is it important to mention if there are any restrictions with the independent variable when writing a verbal description?

**Vocabulary**

- Function
- Linear Function
- Quadratic Function
- Constant
- Independent Variable
- Dependent Variable