**Vocabulary**

expected family contribution, periodic savings plan

**TEKS** 8(1)(A), 8(1)(F), 8(12)(G)

**Example Modeling Periodic Savings Plans**

You estimated your EFC for the first year of college using an online calculator. Your college calculated your EFC to be $1,800 more than your estimated EFC. You have 12 weeks to make up the difference. You devise a periodic savings plan. Your plan is to make weekly deposits for 12 weeks. Each deposit will be $10 more than the previous deposit.

If you follow your plan, how much will you deposit in the last week?

**Solution**

Model the situation.

Let *x* = the amount of the first week's deposit.

The first deposit will be $95. The last deposit will be $95 + $110 = $215.

Digits, Grade 8, Volume 2, Homework Helper
Unit D: Two-Dimensional Shapes
Unit E: Measurement and Data
Math Symbols
Formulas Measures
Properties

Topic 11: Scatter Plots
Topic 12: Samples

Unit F: Personal Financial Literacy
Unit G: Step-Up Lessons
- 11-1: Interpreting a Scatter Plot
- 11-1: TEKS Practice
- 11-2: Constructing a Scatter Plot
- 11-2: TEKS Practice
- 11-3: Investigating Patterns – Association
- 11-3: TEKS Practice
- 11-4: Linear Models – Fitting a Straight Line
- 11-4: TEKS Practice
- 11-5: Using the Equation of a Linear Model
- 11-5: TEKS Practice
- 11-6: Additional Problem Solving
- 11-6: TEKS Practice

Topic 15: Step-Up Lessons

English/Spanish Glossary
Formulas
- 15-1: Solving Equations Using the Distributive Property
- 15-1: TEKS Practice
- 15-2: Solutions – One, None, or Infinitely Many
- 15-2: TEKS Practice
- 15-3: Exponents and Multiplication
- 15-3: TEKS Practice
- 15-4: Exponents and Division
- 15-4: TEKS Practice
- 15-5: Operations with Numbers Expressed in Scientific Notation
- 15-5: TEKS Practice
- 15-6: Solving Simultaneous Linear Equations Using Addition
- 15-6: TEKS Practice
- 15-7: Solving Simultaneous Linear Equations Using Subtraction
- 15-7: TEKS Practice