温度x/°C

20

22

24

26

28

30

32

产卵数y/个

6

10

21

24

64

113

322

t=x²

400

484

576

676

784

900

1024

z=lny

1.79

2.30

3.04

3.18

4.16

4.73

5.77

   $\overline{x}$

   $\overline{t}$

   $\overline{y}$

   $\overline{z}$

26

692

80

3.57

   $\frac{{{\displaystyle \sum }}_{i=1}^7\left(x_i-\overline{x}\right)\left(y_i-\overline{y}\right)}{{{\displaystyle \sum }}_{i=1}^7{\left(x_i-\overline{x}\right)}^2}$

   $\frac{{{\displaystyle \sum }}_{i=1}^7\left(t_i-\overline{t}\right)\left(y_i-\overline{y}\right)}{{{\displaystyle \sum }}_{i=1}^7{\left(t_i-\overline{t}\right)}^2}$

   $\frac{{{\displaystyle \sum }}_{i=1}^7\left(z_i-\overline{z}\right)\left(x_i-\overline{x}\right)}{{{\displaystyle \sum }}_{i=1}^7{\left(x_i-\overline{x}\right)}^2}$

   $\frac{{{\displaystyle \sum }}_{i=1}^7\left(z_i-\overline{z}\right)\left(t_i-\overline{t}\right)}{{{\displaystyle \sum }}_{i=1}^7{\left(t_i-\overline{t}\right)}^2}$

1157.54

0.43

0.32

0.00012