Question 11
Coordinate GeometryA straight line makes an angle of 60° with the positive x-axis and cuts the y-axis at y = 7, find the equation of the line.
- A.y = √3x + 7
- B.y = −x√3 + 7
- C.y = √3x − 7
- D.y = −x/√3 + 7
Show the answer and explanation
Answer: A (y = √3x + 7)
Explanation
The gradient is tan 60° = √3 and the y-intercept is 7, so y = √3x + 7.