Perform linear regression and solve the system of equations for the Benzoic Acid/Caffeine practical.

This app allows you to enter a set of xy data points (conc. versus absorbance) for benzoic acid and caffeine at each of the two wavelengths and calculate the slope and intercept of the best-fit line (for example, m₂₃₀^caf, and b₂₃₀^caf). It will then solve the system of equations for the concentration of the unknown.

Enter the number of of xy datapoints for each regression:

Start Benzoic Acid 230 nm Calculate Benzoic Acid 230 nm.

Start Benzoic Acid 270 nm Calculate Benzoic Acid 270 nm.

Start Caffeine 230 nm   Calculate Caffeine 230 nm.

Start Caffeine 270 nm   Calculate Caffeine 270 nm.

Clear and Start next compound/wavelength.

C (mg/L)

Absorbance

How to solve for unknown. Enter unknown data. Solve system of equations