—What's your mother's job?
—
A:She is reading.
B:She is 40 years old.
C:She wants to be a teacher.
D:She is a manager.
x
0
1
2
3
4
y
2.2
4.3
t
4.8
6.7
且回归方程是 y^=0.95x+2.6 ,则 t= ( )