I need some help with this problem, i'm not really sure how to go about it. And i dont know what the box bracket indicates.
Sketch the interval [-1,4) on the real number scale.
2006-09-06 07:50:44 · 3 answers · asked by lpfanz89 1 in Education & Reference ➔ Homework Help
draw a number line. make a filled-in circle at -1. then make an open (not filled-in) circle at 4. then shade everything in between.
the '[' means "including"
the ')' means "everything up to, but NOT including"
2006-09-06 07:54:17 · answer #1 · answered by jimvalentinojr 6 · 1⤊ 0⤋
The box bracket means that the interval includes that number, the parenthesis means that it goes right up to that number but doesn't include it.
The "real number scale" is a line with equal segments numbered so that the increase form left to right. For the interval [-1,4), I would start round -2 and number through 5 or so. Then draw a filled circle at -1 and am open circle at 4 and fill in a line between them. Really harder to explain than just to look at some examples and do it.
2006-09-06 07:59:35 · answer #2 · answered by bill_72_99 2 · 0⤊ 0⤋
Box bracket means that the line stops at a certain point. In this case, the line stops at -1. The parenthesis means that the line goes on forever with a certain number included. So you would draw a number line-label it starting from -2 and go up to 5 or 6. Then you would draw a dot on -1and then pull a line (starting from the dot) all the way up to 4. Then, to top it off, put a bracket, just like the problem has on the -1 and a parenthesis on the 4. Now that I've solved the problem, keep this in mind when you practice the next ones.
2006-09-06 07:58:50 · answer #3 · answered by craftykid22 3 · 0⤊ 1⤋