The graph in the image shows a straight red line that has a negative slope. This indicates that as the x-values increase, the y-values decrease at a constant rate, which characterizes a linear decreasing function.

So, the correct answer is A. Linear decreasing.

Would you like a more detailed explanation or have any further questions?

Here are 5 related questions for deeper understanding:

1. What is the general equation of a linear function?
2. How do you differentiate between linear and exponential functions?
3. Can you explain what exponential growth looks like on a graph?
4. How does the slope of a line relate to its rate of change?
5. What are the characteristics of exponential decay?

Tip: A linear graph will always be a straight line, while exponential graphs are curved, showing rapid growth or decay.