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Functions and graphs (the modulus function (the modulus of a number a, is…
Functions and graphs
the modulus function
the modulus of a number a, is written |a|, it is its non- negative numerical value
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to sketch the graph of y = |ax + b| , sketch y=ax + b then reflect the section of the graph below the x- axis in the z axis
inverse functions
the inverse of a function performs the reverse operation to the original function. it takes the elements in the range of the original function and maps them back to the domain of the original function.
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composite functions
two or more functions can be combined to make a new function. the new function is called a composite function
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functions and mappings
a mapping transforms one set of numbers into a different set of numbers. The mapping can be described in words or through an algebraic equation. it can also be expressed on a graph
a mapping is a function id every input has a distinct output. functions can either be one-to-one or many-to-one mappings
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