The example of transistors replacing vacuum tubes, represents a1 pointJ curveS curveParabola curveDemand Curve

The example of transistors replacing vacuum tubes represents an S curve. Here's a step-by-step explanation:

1. Introduction: The S curve begins with a slow start, which represents the initial introduction of a new technology. In this case, it's the introduction of transistors.

2. Growth: The curve then steepens, representing a period of rapid growth. This is when the new technology (transistors) starts to gain acceptance and replaces the old technology (vacuum tubes).

3. Maturity: The curve then flattens out, representing the maturity stage. This is when the new technology (transistors) has fully replaced the old technology (vacuum tubes) and growth slows down.

4. Saturation: The end of the S curve represents the saturation point, where nearly all potential users have adopted the new technology.

The S curve is often used to represent the lifecycle of a technology or product, from introduction to growth, maturity, and saturation. It's called an "S" curve because the shape of the graph resembles the letter "S".