Quiz

Cambridge Mathematics 9: Functions and graphs

10 questions with solutions on the Cambridge Mathematics 9 topic: function values, gradient and intercept, the equation of a line, inverse functions.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. f(x) = 2x + 3. What is f(4)?Enter a number only

2. The gradient of y = 5x − 2?Enter a number only

3. Where does y = 3x + 7 cross the y-axis (y = ?)Enter a number only

4. The gradient of the line through (1, 2) and (3, 8)?Enter a number only

5. A line parallel to y = 2x + 1 has gradient?Enter a number only

6. The line with gradient 4 crossing the y-axis at −3?

A. y = −3x + 4

B. y = 4x − 3

C. y = 4x + 3

D. y = x − 3

7. The point (2, y) is on y = 3x − 1. What is y?Enter a number only

8. Where does y = 2x − 6 cross the x-axis (x = ?)Enter a number only

9. The inverse of f(x) = x + 5?

A. f⁻¹(x) = 5 − x

B. f⁻¹(x) = x/5

C. f⁻¹(x) = x − 5

D. f⁻¹(x) = −x − 5

10. y = x². What is y when x = −3?Enter a number only