Return to the correct graphing mode

Press these keys

Walkthrough

1. 1
   Open MODE

   Find the row FUNCTION / PARAMETRIC / POLAR / SEQ.

2. 2
   Select FUNCTION

   For ordinary y=f(x), highlight FUNCTION and press ENTER.

3. 3
   Return and verify

   Press 2nd → MODE, then Y=. You should see Y1, Y2, …

Worked example