Move the \color{orange}{\text{orange dot}} to \color{orange}{SOLN_TXT} on the number line.
init({
range: [ [LOWER_BOUND - 0.3, UPPER_BOUND + 0.4], [-1, 1] ],
scale: [350, 40]
});
style({arrows: ">"});
line( [ 0, 0 ], [ UPPER_BOUND + 0.06, 0 ] );
style({arrows: "->"});
line( [ 0, 0 ], [ LOWER_BOUND - 0.06, 0 ] );
style({arrows: ""});
for ( var x = LOWER_BOUND; x <= UPPER_BOUND; x += MARK_INCREMENT ) {
line( [ x, -0.2 ], [ x, 0.2 ] );
}
style({ stroke: BLUE, strokeWidth: 3.5 });
line( [ LOWER_BOUND, -0.2], [LOWER_BOUND, 0.2]);
label( [ LOWER_BOUND, -0.53 ], LOWER_BOUND, "center", { color: BLUE });
line( [ UPPER_BOUND, -0.2], [UPPER_BOUND, 0.2]);
label( [ UPPER_BOUND, -0.53 ], UPPER_BOUND, "center", { color: BLUE });
addMouseLayer();
graph.movablePoint = addMovablePoint({ constraints: { constrainY: true }, snapX: 0.025 });
graph.movablePoint.onMove = function( x, y ) {
return [ min( max( LOWER_BOUND, x ), UPPER_BOUND ), y ];
};
Move the orange dot to select your answer.
graph.movablePoint.coord[0]
if ( guess === 0 ) {
return "";
}
return abs( SOLUTION - guess ) < 0.001;
graph.movablePoint.setCoord( [ guess, 0 ] );
Above we've drawn the number line from 0 to 1, divided into 10 equal pieces.
The line is divided into 10 pieces, which means:
\color{green}{\text{piece of line}} = \color{red}{MARK_INCREMENT}
\color{orange}{SOLN_TXT} =
\color{red}{MARK_INCREMENT} * \color{blue}{TENTHS}
Therefore, moving the \color{orange}{\text{orange dot}}
\color{blue}{TENTHS} placeplural(TENTHS) will put it at the position
\color{orange}{SOLN_TXT}.
var MI = MARK_INCREMENT;
for ( var x = LOWER_BOUND + MI; x < UPPER_BOUND - MI/2; x += MI ) {
label( [ LOWER_BOUND + x, -0.53 ], x.toFixed(1) , "center");
}
style({ stroke: "#6495ED", fill: "#6495ED", strokeWidth: 3.5, arrows: "->" });
line( [ 0, 0 ], [ SOLUTION, 0 ] );
graph.movablePoint.visibleShape.toFront();
label( [ TENTHS, -0.53 ], SOLN_TXT, "center", { color: "orange" });
graph.movablePoint.moveTo( SOLUTION, 0 );
The orange number shows where \color{orange}{SOLN_TXT} is on the number line.