Question

What is the answer for "The points (4,r) and (8,-11) lie on a line with slope -3. Find the missing coordinate r."?​

Answer 1

The answer to your question is R=1

Answer 2

• r = 1

Explanation:

Use the slope formula:

• m = (y₂ - y₁)/(x₂ - x₁)
• m = -3, x₁ = 4, y₁ = r, x₂ = 8, y₂ = -11

Substitute values and solve for r:

• -3 = (-11 - r)/(8 - 4)
• -3 = -(11 + r)/4
• 11 + r = 12
• r = 12 - 11
• r = 1