Thanks. After some fiddling, I realized that de selecting the labels box in the axis setting did the trick as well. Here is my graph and script
Graph Builder(
Show Legend( 0 ),
Show Title( 0 ),
Variables(
X( :Name( "May-August precip" ) ),
Y( :Name( "Ndfa (%)" ) ),
Y( :Exponential 3P, Position( 1 ), Side( "Right" ) ),
Overlay( :Site )
),
Elements( Points( X, Y( 1 ), Legend( 13 ) ), Formula( X, Y( 2 ), Legend( 12 ) ) ),
SendToReport(
Dispatch(
{},
"Exponential 3P",
ScaleBox,
{Min( 60 ), Max( 105 ), Inc( 10 ), Minor Ticks( 0 ), Label Row(
{Automatic Font Size( 0 ), Automatic Tick Marks( 0 ), Show Major Labels( 0 ), Show Major Ticks( 0 ), Show Minor Ticks( 0 )}
)}
),
Dispatch( {}, "", GraphBuilderComponentBox( 7 ), {Select} ),
Dispatch( {}, "", AxisBox, {Select} ),
Dispatch( {}, "", AxisBox( 2 ), {Select} ),
Dispatch( {}, "Y r title", TextEditBox, {Set Text( "" )} ),
Dispatch( {}, "Graph Builder", FrameBox, {Select} )
)
);