document.write( "Question 141358: Describe what the graph of interval [-4,10] looks like. \n" ); document.write( "

Algebra.Com's Answer #102996 by nabla(475) $\"\"$ $\"About$

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When we use brackets with intervals, it means the numbers are included.
\n" ); document.write( "To be clear,
\n" ); document.write( "[-4,10] implies all numbers (inclusive) between -4 and 10. In equality form, -4<=x<=10.
\n" ); document.write( "Now, depending on the method you are being taught, to draw the graph, you would form a numberline of at least 2 (the endpoints) but preferably more numbers. To imply inclusion, some use a filled-circle. Thus, you could accurately graph the interval using two solid dots, one at -4 and one at 10, and a line connecting them.
\n" ); document.write( "There are other methods, such as using a bracket instead of a filled in circle. This isn't usually the preferred way, to my knowledge, because it is less intuitive than the dot method.
\n" ); document.write( "Now, just so you are aware, parentheses are used to imply exclusion of the number. For instance, (-2,5] means all numbers greater than -2 and less than or equal to 5. \n" ); document.write( "

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