What is a function?, A) A shape with angles, B) A rule that changes one number into another, C) A type of equation with only one answer, D) A graph only, In the function f(x)=x+3 - what does the function do?, A) Multiply by 3, B) Divide by 3, C) Add 3, D) Subtract 3, What does f(5) mean?, A) Multiply f by 5, B) Put 5 into the function, C) Draw a graph, D) Solve an equation, Which of these is a real-life example of a function?, A) Shoe size and favourite colour, B) Time and temperature during the day, C) Name and age of a pet rock, D) Random numbers from a bag, In a function machine, the number you start with is called:, A) Output, B) Graph, C) Answer, D) Input, What type of graph does this function make? y=2x+1, A) Circle, B) Curve, C) Straight line, D) Triangle, What is the output when x=4?, A) 2, B) 4, C) 5, D) 6, Which statement is TRUE about functions?, A) They only work with graphs, B) They show how one thing depends on another, C) They are only used in school maths, D) They always use triangles, Which function means “multiply by 2 then add 1”?, Why do we use graphs with functions?, A) To decorate maths books, B) To make numbers harder, C) To see patterns and relationships, D) To avoid calculations

What is a function?

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