Given a reaction curve with product concentration on the y-axis and time on the x-axis, how would you calculate the initial reaction rate?

• A. By finding the average slope of the curve.
• B. By calculating the slope of the tangent line at the very beginning of the curve.
• C. By calculating the slope of the tangent line at the end of the curve.
• D. By measuring the total change in product concentration over the entire reaction time.

Answer: (B)