一元线性回归模型<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251123/22555446_0.png">，（i=1，2，3…，n）中，<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251123/22555446_0_1.png">称为解释变量，<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251123/22555446_0_2.png">称为被解释变量。（）