NO.PZ202306130100003202
问题如下：
Based on the regression, if the CPIENG decreases by 1.0 percent, the expected return on Stellar common stock during the next period is closest to:
选项：
A.
0.0073 (0.73 percent).
B.
0.0138 (1.38 percent).
C.
0.0203 (2.03 percent).
解释：
C is correct. From the regression equation, Expected return = 0.0138 + (−0.6486× −0.01) = 0.0138 + 0.006486 = 0.0203, or 2.03 percent.
为什么x减少了0.1，求y期望值？？也没告诉以前x是多少啊。。。 如果问x减少了0.1，y会变化多少，我还能理解。。
