Question 22 whole number? 'he following are the ages of children in Miss Cruella's science class. What is the median age of the children, rounded to the nearest 15|15|14|11|14|11l12|12|11|13|15... @@O 15 14 13 12 11 Question 23 When two sets of data x and y are presented in a scatter plot, the graph below was obtained. The variables x and y can be said to demonstrate correlation. perfect negative high positive high negative perfect positive no @@0 Question 24 1 Point Score (x) 6 7 8 10 11 12 ... Frequency (f) 5 3 7 O 3 1 The set of data above shows the quiz scores of Mr. Hedway's maths class. Calculate the mean of the scores of the students, correct to one decimal place. A 6 B 8 15 D 12 E 9Question 25 3xy+ 1? How many terms are there in the algebraic expression 5 Question 26 1 Point Which of the following is a correct factorisation of the expression -3x + 6y -9z? A -3(-x-2y-3z) B -3(x - 2y+ 3z) C 3(x - 2y+ 3z) D -3(x+6y-92) E 3(x - 6y +9z)