human
Determine the function of a single function machine used to create an algebraic expression Tom and Katie are discussing this function machine ![A function machine with 3 rectangles in a row, joined by arrows pointing from left to right. The first rectangle on the left has "input" written above it and "m" written inside it. The middle rectangle is empty and the final rectangle has "output" written above it and "4m" written inside it.]() Tom says the function could be \( +3 m \)

Katie says the function could be \( \times 4 \)

Who do you agree with? Neither is correct
gpt
Does not realise that two letters together, or a number and letter together, are multiplying