this.chartCtx_.font = '10px Arial';
      this.chartCtx_.textAlign = 'right';
      this.chartCtx_.textBaseline = 'middle';

      for (let t = 0; t < VERTICAL_TICKS; t++) {
        tickYPosition = Math.round(t * tickYInterval);
        tickVal = (max - t * tickValInterval).toFixed(4);

        this.chartCtx_.moveTo(0, tickYPosition);
        this.chartCtx_.lineTo(-AXIS_TICK_SIZE, tickYPosition);
        this.chartCtx_.fillText(tickVal,
            -AXIS_TICK_SIZE - AXIS_LABEL_PADDING, tickYPosition);
     