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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