1 00:00:00,025 --> 00:00:04,051 So, we talked about domain, we've talked about range, we've talked about how we 2 00:00:04,051 --> 00:00:08,199 can impose domain restrictions on functions, depending on the situations in the 3 00:00:08,199 --> 00:00:12,164 real world that they're involved in, and we've talked about overall function 4 00:00:12,164 --> 00:00:15,800 behavior. However, I still want to dig deeper. Let's take a look at this 5 00:00:15,800 --> 00:00:20,091 function, g of x equals the square root of x. Now remember, that we just have a 6 00:00:20,091 --> 00:00:24,379 radical sign and no sign in front of it, it's implied that this is the positive 7 00:00:24,379 --> 00:00:28,190 square root, this is not a plus or minus thing. Let's take a look at the graph 8 00:00:28,190 --> 00:00:32,040 of this function. So, here's our graph of g of x equals the square root of x. 9 00:00:32,040 --> 00:00:36,442 Now, I could describe its behavior by saying that it's increasing from 0 to 10 00:00:36,442 --> 00:00:41,140 infinity. But let's think back to the domain. So, what do you think the domain 11 00:00:41,140 --> 00:00:44,159 of g of x is? All numbers between what and what?