You can put this solution on YOUR website! First you need to understand what the symbols mean. A [ means to include the left side point. A ] means to include the right side point. A ( means the left side point is not included. A ) means the right side point is not included.
Now draw a number line and mark the two given X values -4 and 10 with an open circle (a little o). If the end point is a bracket, darken in the o. If the end point is a paren, leave the circle open. An open circle means "this end point is not included". Then darken in the line segment between the two points. In this case both end points are included in the plot.
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