What is a point on the line represented by the equation y−5.5=

4
1

(x+2)?

(−2, 5.5)

(2, −5.5)

(5.5, −2)

(−5.5, 2)

1 answer

To find a point on the line represented by the equation \(y - 5.5 = \frac{4}{1}(x + 2)\), we need to simplify the equation and find points that satisfy it.

First, simplify the equation:

  1. Start with the given equation: \[ y - 5.5 = 4(x + 2) \]

  2. Distribute the 4: \[ y - 5.5 = 4x + 8 \]

  3. Add 5.5 to both sides to solve for \(y\): \[ y = 4x + 8 + 5.5 \] \[ y = 4x + 13.5 \]

Now we have the equation of the line in slope-intercept form \(y = mx + b\), where \(m = 4\) and \(b = 13.5\).

Next, we can check which of the provided points lies on this line.

  1. Point (-2, 5.5): \[ y = 4(-2) + 13.5 = -8 + 13.5 = 5.5 \quad \text{(True)} \]

  2. Point (2, -5.5): \[ y = 4(2) + 13.5 = 8 + 13.5 = 21.5 \quad \text{(False)} \]

  3. Point (5.5, -2): \[ y = 4(5.5) + 13.5 = 22 + 13.5 = 35.5 \quad \text{(False)} \]

  4. Point (-5.5, 2): \[ y = 4(-5.5) + 13.5 = -22 + 13.5 = -8.5 \quad \text{(False)} \]

The only point that satisfies the equation \(y = 4x + 13.5\) is (-2, 5.5).

Thus, the correct answer is (−2, 5.5).