The area under the curve  bounded from below by the x-axis and on the right by x = 4 is  s...

The area under the curve  bounded from below by the x-axis and on the right by x = 4 is  square units. Using the ideas presented in this section, what do you think is the area under the curve of  bounded from below by the x-axis and on the left by x = −4? Justify your answer.