+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. )