Page 195 - Mathematics Coursebook

22 Mrs Sanchez gave her class an algebra test.
These are the students’ scores, marked out of 20.
16 17 9 19 12 3 12 1 20 7 10 11 18 2
8 12 3 16 6 7 19 15 15 18 9 12 8 17
a Copy and complete the grouped frequency table.

Score Tally Frequency

1–5
6–10
11–15
16–20

b How many students are there in Mrs Sanchez’s class?
c How many students had a score less than 11?
Explain how you worked out your answer.
23 Which of these expressions is the odd one out?
Explain your answer.

3(6x + 4) 6(2 + 3x) 2(6 + 9x) 9(2x + 2)

24 Look at the coordinate graph.
y
5
4
D 3 A
2
1
x
–5 –4 –3 –2 –1 1 2 3 4 5
–1
–2
C –3 B
–4
–5

a What are the coordinates of D?
b What is the equation of the straight line through B and C?
c What are the coordinates of the centre of the square ABCD?

25 a Copy and complete this table of values for y = x – 3.
x −3 −1 1 3 5
y = x − 3 −2
b Draw a graph of the line y = x − 3.

194 End of year review