Algebra I math definitions? only a few so please lend a hand?

Question

an equation with one or more variables - begins with o, 12 letters
writing units of each variable in a real-life problem - 12 letters
numbers and/or variables combined with mathematical symbols - 10 letters
collection of all output values - 5 letters
collection of all input values - 6 letters, 2nd letter is o, last letter is n
a relationship between input and output - 8 letters, second to last letter o

thanks

Answer 1

Well, the first 3 aren't clear, but here are the last 3:
collection of all output values = range
collection of all input values = domain
a relationship between input and output = function

Answer 2

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