First Press [STAT] to access the STAT menu.
2 Scroll right to highlight the CALC menu.
3 Press [5] to select QuadReg(ax+b).
• Press [2nd] [1] [,] [2nd] [2] to input L1,L2.
• Press [,] [VARS], scroll right to highlight Y-VARS, then press [1] [1] to input ,Y1.
• Press [ENTER] to calculate the quadratic regression. This will also copy the quadratic regression equation to the Y= Editor.
