The equation can be interpreted based on the context. Without additional context, both options A and B appear to be valid linear equations.
- Option A: \( C = 1.25t + 18 \)
- Option B: \( C = -1.25t + 18 \)
If you provide more information about what these variables represent or the context in which this equation is used, I can help determine which equation is correct or more appropriate for that context.