Meeting Functions

IB Maths Studies: Meeting Functions

"Get to the heart of what functions are about by matching these inputs, equations and outputs together - a "simple" matching activity!"Its easy to study functions at this level and forget what they are all about. Equations where "y" is dependent on "x" all work on the principal that for given "x" values there are corresponding "y" values. The function describes what you have to do with the "x" values to generate the...

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Comments 2

Antony Lewis 22 August 2017 - 06:43

Great activity! I used the worksheet (Meeting functions) with my class - and got them to place the relevant inputs, function and outputs in a table on an A3 poster. The only comment I would make is that the output {-4,-3,-1} should be {1,3,4} ie. there should not be any negative signs.

Jim Noble 23 August 2017 - 18:05

Hi Antony, thanks for pointing this out! Can you just confirm for me that you are looking for the output that goes with input (16, 9, 1) and the function y = x^0.5? I think thats right in which case am I right in saying that since y = x^0.5 is a relation then the outputs are (-4, -3, -1, 1, 3, 4).... (still needs correcting) I think, when I made this, I wanted there to be an example of a one to many relation to facilitate the discussion about the difference between a function and a relation. I'll just wait your answer unless I have my wires crossed..... thanks, Jim

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