Which of these points lies on the line described by the equation below?

Y — 4=ー2(x-6)
• A. (4,6)
• B. (6,4)
O c. (-4, -6)
• D. (-6, -4)

1 answer

To determine which point lies on the line described by the equation \( Y - 4 = -2(x - 6) \), we can start by rewriting the equation in slope-intercept form ( \( Y = mx + b \) ).

  1. Start with the given equation: \[ Y - 4 = -2(x - 6) \]

  2. Distribute on the right side: \[ Y - 4 = -2x + 12 \]

  3. Add 4 to both sides to solve for \( Y \): \[ Y = -2x + 16 \]

Now we have the equation of the line in slope-intercept form: \( Y = -2x + 16 \).

Next, we'll substitute each of the given points into the equation to see if they satisfy it.

Option A: (4, 6) \[ Y = -2(4) + 16 = -8 + 16 = 8 \quad \text{(not 6)} \]

Option B: (6, 4) \[ Y = -2(6) + 16 = -12 + 16 = 4 \quad \text{(correct)} \]

Option C: (-4, -6) \[ Y = -2(-4) + 16 = 8 + 16 = 24 \quad \text{(not -6)} \]

Option D: (-6, -4) \[ Y = -2(-6) + 16 = 12 + 16 = 28 \quad \text{(not -4)} \]

The only point that satisfies the equation is B. (6, 4).