Question

Select all of the following that are ordered pairs of the given function.

Answer 1

The answers are: (-1, 5), (0, 3), (2, -1)


F(x) = 3 - 2x can be expressed as y = 3 - 2x.
Now, let's substitute points from each choice to see which one is true.

1. (-2, -1)
    x = -2, y = -1
    y = 3 - 2x
    -1 = 3 - 2 * (-2)
    -1 = 3 - (-4)
    -1 = 3 + 4
    -1 ≠ 7  - not correct

2. (-1, 5)
    x = -1, y = 5
    y = 3 - 2x
    5 = 3 - 2 * (-1)
    5 = 3 - (-2)
    5 = 3 + 2
    5 = 5   - correct


3. (0, 3)
    x = 0, y = 3
    y = 3 - 2x
    3 = 3 - 2 * 0
    3 = 3 - 0
    3 = 3   - correct

4. (1, 0)
    x = 1, y = 0
    y = 3 - 2x
    0 = 3 - 2 * 1
    0 = 3 - 2
    0 = 1   - not correct

5. (2, -1)
    x = 2, y = -1
    y = 3 - 2x
    -1 = 3 - 2 * 2
    -1 = 3 - 4
    -1 = -1    - correct