Sharp EL-W531X

67
<Example 3>
When a weight was hung on a spring, the following
relation was obtained for the extension of the spring and
the force applied to the spring. Use linear regression to
find the coefficients a and b of the relational expression
y = a + bx, and the correlation cofficient r.
Select Statistics mode
1 (STAT) 1 (LINE)
Operation
0.028 0.20
0.073
0.207
...
Spring extension x [m] Force F [N]
0.028
0.073
0.207
0.118
0.16
0.2
0.39
1
0.6
0.77
0.39
1.00
a
b
r
Display