An engineer measures the peak current (in microamps) when a solution containing an amount of nickel (in parts per 106 ) is added to a buffer. The experiment was repeated for eleven different values of nickel solutions. A scatterplot showing the data is given below: Peak Current in Eleven Buffers with Added Nickel Solutio Suppose a regression line was added to the plot above. If an additional measurement had been taken with the nickel of 72 parts per 106 and a peak current of 0.25 microamps, adding this observation would: A. increase the intercept, decrease the slope. B. increase the intercept, increase the slope. C. decrease the intercept, increase the slope. D. decrease the intercept, decrease the slope. E. not affect the regression line.