Windows Calculator  Graphing mode

click fx button   OR maximize window

"Expression"  function.   "Analyze" lightning bolt.***
or equation in x and y (but can't be Analyzed).
Can click buttons on calculator, e.g. sqrt, log y ...

Hover on graph shows x,y coords

Switching between full-screen window and regular-size window distorts the graphs.

Graph Options button: X, Y mins and maxes.
Can't turn off gridlines.