Question 37
Coordinate GeometryA line in the x−y plane passes through the point (−9, 10). If the gradient of the line is ⅓, find the equation of the line.
- A.y = x/3 + 13
- B.y = 9x + 10
- C.y = −x/3 + 10
- D.y = 13x − ⅓
Show the answer and explanation
Answer: A (y = x/3 + 13)
Explanation
y − 10 = ⅓(x + 9) gives y = x/3 + 3 + 10 = x/3 + 13.