using the Aplha key

Question

I have a TI 84 Plus Silver Edition and so does a student I am tutoring (via Zoom).

When I hit [Alpha][Y=] all I get it the normal [Y=] return. He gets a menu in which summation and log base change options appear.

Why are our calcualtors the same device but giving different outputs?

Thanks

Answer 1

Operating System could be the reason. It also could be the mode of the calculator.