MAT 116 Week 8 Exercise Concept Check

A square bracket means that the interval includes that endpoint. Since in this problem both brackets are square, both endpoints are included. This interval goes from -4 to 10 and includes the endpoints. On a number line, one can fill in those endpoints. Alternatively, instead of filling in the endpoints, one can draw a bracket at -4 and another bracket at 10. If the interval had not included parentheses, one would not have filled in the circles (or if one used brackets/parenthesis, he or she would have put a parenthesis on the number line). A straight line and mark a line from -4 to 10 with [at -4 and] at 10