+3,-2; Down to the left. (0,-2),( 1,- 18),(-2,-4)

In the root sign, plus number = move to the left; Negative number = move to the right;

Except the root sign, addend = move up; Negative number = move down.

Finally, substitute the point, just like the first question, just substitute x and find y.

3. Domain: [0, ∞) and Range: [0,-∞)

Domain is the maximum extension from left to right, and Range is the maximum extension from top to bottom.

The second picture, you draw it yourself, and I can't help you draw it here. In fact, calculators TI-83, 84 and 85 can all be drawn.

If you can't use a calculator, you can draw according to what I just said.

If the formula is negative, the line will go down; Positive number, the line will rise. The second problem line is upward.

( ? In the root sign, plus number = move to the left; Negative number = move to the right;

Except the root sign, addend = move up; Negative number = move down. )