Problem:
Let's denote the age of a child by x. Then if a child can only enter the jumping castle if he/she is less than 15 years old, this means that:
[tex]x\text{ }\leq15[/tex]
That is equivalent to the interval
[tex](-\infty,15\rbrack[/tex]
But the age of the child cant be negative so the correct interval would be:
[tex](0,15\rbrack[/tex]
0 does not belong to the interval because a child with 0 years does not exist. So the graph for the above inequality is:
