Casio 83 or 85
The 85 and 83 are pretty much the same so these videos should cover you for both.
PMCC
Correlation
y = a + bx
Regression
Mean and Standard Deviation
The 85 and 83 are pretty much the same so these videos should cover you for both.
PMCC
Correlation
y = a + bx
Regression
Mean and Standard Deviation