## Exam-Style Questions on Graphs## Problems on Graphs adapted from questions set in previous exams. |

## 1. | GCSE Higher |

Show that line \(5y = 7x - 7\) is perpendicular to line \(7y = -5x + 55\).

## 2. | GCSE Higher |

A straight line goes through the points \((a, b)\) and \((c, d)\), where

$$a + 3 = c$$ $$b + 6 = d$$Find the gradient of the line.

## 3. | GCSE Higher |

The graph shows the height of water in a container over a period time during which the water enters the container at a constant rate.

Which of the following might be a diagram of the container?

a. b. c. d. e.

## 4. | GCSE Higher |

The diagram is of a container which is filled with water entering at a constant rate.

Which of the following might be the graph of height of the water in the container plotted against time?

a. b. c. d. e.

## 5. | GCSE Higher |

(a) By completing the square, solve \(x^2+8x+13=0\) giving your answer to three significant figures.

(b) From the completed square you found in part (a) find the minimum value of the curve \(y=x^2+8x+13\).

## 6. | GCSE Higher |

The graph of the following equation is drawn and then reflected in the x-axis

$$y = 2x^2 - 3x + 2$$(a) What is the equation of the reflected curve?

The original curve is reflected in the y-axis.

(b) What is the equation of this second reflected curve?

## 7. | GCSE Higher |

(a) Find the interval for which \(x^2 - 9x + 18 \le 0\)

(b) The point (-4, -4) is the turning point of the graph of \(y = x^2 + ax + b\), where a and b are integers. Find the values of a and b.

## 8. | GCSE Higher |

(a) Write \(2x^2+8x+27\) in the form \(a(x+b)^2+c\) where \(a\), \(b\), and \(c\) are integers, by 'completing the square'

(b) Hence, or otherwise, find the line of symmetry of the graph of \(y = 2x^2+8x+27\)

(c) Hence, or otherwise, find the turning point of the graph of \(y = 2x^2+8x+27\)

## 9. | IB Studies |

Consider a straight line graph L1, which intersects the x-axis at A(8, 0) and the y-axis at B (0, 4).

(a) Write down the coordinates of C, the midpoint of line segment AB.

(b) Calculate the gradient of the line L1.

The line L2 is parallel to L1 and passes through the point (5 , 9).

(c) Find the equation of L2. Give your answer in the form \(ay + bx + c = 0\) where \(a, b \text{ and } c \in \mathbb{Z}\).

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