An engineer measures the peak current (in microamps) when a solution containing an amount of nickel (in parts per $10^6$ ) is added to a buffer. The experiment was repeated for eleven different values of nickel solutions. A scatterplot showing the data is given below:




Suppose a regression line was added to the plot above. If an additional measurement had been taken with the nickel of $72$ parts per $10^6$ and a peak current of $0.25$ microamps, adding this observation would:

A. decrease the intercept, decrease the slope.
B. increase the intercept, increase the slope.
C. decrease the intercept, increase the slope.
D. increase the intercept, decrease the slope.
E. not affect the regression line.