Identifying perpendicular linear graphs

12 questions

1. Which of these show two lines which are perpendicular?
2. What is the gradient of this line?
3. Which of these values is the reciprocal of 4?
4. Which of these coordinates lie on the line x = 4.5?
5. Which of these lines are parallel to the line with equation 2y-x = 5?
6. A line has gradient 4 and passes through the coordinate (3, 9). What is the equation of the line?
7. Match each number to its negative reciprocal.
8. Select the equation of a line perpendicular to the line with equation y = {1\over 2}x.
9. Which of these are equations of a line perpendicular to the line with equation 3y = 2x + 6?
10. Which of these are equations for lines which are perpendicular to the line with equation y + 2.5x = 0?
11. Which is the equation of the line which passes through the point (3, -1) and is perpendicular to the line with equation y =2-{1\over 3}x?
12. Which of these are equations for lines which are perpendicular to the line with equation y = {1\over\sqrt{20}}x?

License: OGL