init({
range: [ [ -6, 6 ], [ -1, 1 ] ]
});
style({ stroke: "#999" });
line( [ -5, 0 ], [ 5, 0 ] );
for ( var x = -5; x <= 5; x++ ) {
line( [ x, -0.2 ], [ x, 0.2 ] );
label( [ x, -0.53 ], String( x ).replace( /-(\d)/g, "\\llap{-}$1" ), "center", { color: "#999" } );
}
style({ strokeWidth: 3.5 });
line( [ 0, -0.2], [0, 0.2]);
style({ stroke: COLORS[ 0 ], fill: COLORS[ 0 ] });
circle( [ POINTS[ 0 ], 0 ], 0.10 );
style({ stroke: COLORS[ 1 ], fill: COLORS[ 1 ] });
circle( [ POINTS[ 1 ], 0 ], 0.10 );
style({ stroke: COLORS[ 2 ], fill: COLORS[ 2 ] });
circle( [ POINTS[ 2 ], 0 ], 0.10 );
style({ stroke: COLORS[ 3 ], fill: COLORS[ 3 ] });
circle( [ POINTS[ 3 ], 0 ], 0.10 );
label( [ POINTS[ 0 ], 0 ], "A", "above", { color: COLORS[ 0 ] } );
label( [ POINTS[ 1 ], 0 ], "B", "above", { color: COLORS[ 1 ] } );
label( [ POINTS[ 2 ], 0 ], "C", "above", { color: COLORS[ 2 ] } );
label( [ POINTS[ 3 ], 0 ], "D", "above", { color: COLORS[ 3 ] } );
SEGMENT means the distance from \color{COLORS[ IDX_1 ]}{POINT_1} to
\color{COLORS[ IDX_2 ]}{POINT_2}.
SEGMENT = |\color{COLORS[ IDX_1 ]}{POINTS[ IDX_1 ]} - \color{COLORS[ IDX_2 ]}{POINTS[ IDX_2 ]}|
SEGMENT = |POINTS[ IDX_1 ] - POINTS[ IDX_2 ]|
SEGMENT = SOLUTION