A baby was born with a weight of 5 pounds and then began to gain 1.25 pounds per month. Write an equation for W, commaW, in terms of t, commat, representing weight, in pounds, of the newborn baby tt months after birth.

To represent the baby's weight \( W \) in terms of \( t \), where \( t \) is the number of months after birth, we need to account for the initial weight at birth and the rate at which the baby gains weight.

- **Initial weight**: 5 pounds (at \( t = 0 \))
- **Rate of weight gain**: 1.25 pounds per month

The equation that describes the baby's weight \( W \) after \( t \) months is:

\[
W(t) = 5 + 1.25t
\]

Where:
- \( W(t) \) represents the baby's weight in pounds at time \( t \) months,
- \( t \) is the number of months since birth.

This linear equation models the weight of the baby as a function of time.

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### Related Questions:
1. How much will the baby weigh after 6 months?
2. At what age will the baby weigh 15 pounds?
3. If the baby continues to gain weight at this rate, how much will the baby weigh at 12 months?
4. How would the equation change if the baby gained 1.5 pounds per month instead?
5. What is the baby's average weight gain per month over the first 6 months?

### Tip:
In linear equations, the coefficient of \( t \) represents the rate of change, while the constant term represents the initial value.

A baby was born with a weight of 5 pounds and then began to gain 1.25 pounds per month. Write an equation for W, in terms of t, representing weight, in pounds, of the newborn baby t months after birth.

Learn how to represent a baby's weight as a linear equation. The baby starts at 5 pounds and gains 1.25 pounds per month. The equation W(t) = 5 + 1.25t helps calculate the baby's weight after t months. This problem introduces key algebraic concepts and is ideal for Grades 6-8.

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