c 2. How much money will be accumulated in 20 years from a deposit of $1500 every 6 months if the interest rate is 2.75% per month? Use interpolation to work through your interest rates. (x − x₁) - -(£₂-f₁) (x₂-x₁) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Factor value Figure 2-10 axis Lincar interpolation in factor value tables. Table Unknown d Table Known X₂ Required b Linear assumption Known forn axis f = f₁ + a f = 1₁+ = c = S₁+d b

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**How Much Money Will Be Accumulated in 20 Years?**

Consider a deposit of $1500 made every 6 months with an interest rate of 2.75% per month. This problem requires the use of interpolation to calculate the interest rates accurately.

### Graph Description

**Figure 2-10: Linear Interpolation in Factor Value Tables**

The graph depicts linear interpolation in factor value tables. Here’s a breakdown of the elements:

- **Factor Value Axis**: Represents the factor values used for calculations.
- **Horizontal Line (Linear Assumption)**: Connects known and unknown values, highlighting the assumption of linearity for interpolation.
- **Vertical and Horizontal Segments**: Indicate distances or differences between values on the axes.

### Formulas

1. **Main Interpolation Formula**
   \[
   f = f_1 + \left(\frac{x - x_1}{x_2 - x_1}\right)(f_2 - f_1)
   \]
   Where:
   - \( f \) is the interpolated factor.
   - \( f_1 \) and \( f_2 \) are known factor values.
   - \( x \) is the unknown value we are solving for.
   - \( x_1 \) and \( x_2 \) are known values on the axis.

2. **Alternative Formula**
   \[
   f = f_1 + \frac{a}{b} = f_1 + c = f_1 + d
   \]
   Here, \( a \), \( b \), \( c \), and \( d \) are incremental values used to achieve interpolation, representing adjustments made during the process.

This methodology allows for precise calculations of accumulated interest over time, using step-by-step interpolation within the context of factor value tables.
Transcribed Image Text:**How Much Money Will Be Accumulated in 20 Years?** Consider a deposit of $1500 made every 6 months with an interest rate of 2.75% per month. This problem requires the use of interpolation to calculate the interest rates accurately. ### Graph Description **Figure 2-10: Linear Interpolation in Factor Value Tables** The graph depicts linear interpolation in factor value tables. Here’s a breakdown of the elements: - **Factor Value Axis**: Represents the factor values used for calculations. - **Horizontal Line (Linear Assumption)**: Connects known and unknown values, highlighting the assumption of linearity for interpolation. - **Vertical and Horizontal Segments**: Indicate distances or differences between values on the axes. ### Formulas 1. **Main Interpolation Formula** \[ f = f_1 + \left(\frac{x - x_1}{x_2 - x_1}\right)(f_2 - f_1) \] Where: - \( f \) is the interpolated factor. - \( f_1 \) and \( f_2 \) are known factor values. - \( x \) is the unknown value we are solving for. - \( x_1 \) and \( x_2 \) are known values on the axis. 2. **Alternative Formula** \[ f = f_1 + \frac{a}{b} = f_1 + c = f_1 + d \] Here, \( a \), \( b \), \( c \), and \( d \) are incremental values used to achieve interpolation, representing adjustments made during the process. This methodology allows for precise calculations of accumulated interest over time, using step-by-step interpolation within the context of factor value tables.
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