This input variable has units that can be integers or decimals, so the graph of the function will be?

"one today is worth two tomorrows; and
farther, have you somewhat to do tomorrow, do it today"
controlling time

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"Get what you can, and what you get hold;
'Tis the stone that will turn all your lead into gold"
materialism/self help

"fools make Feasts, and wise men eat them"
efficiency

"early to bed, and early to rise, makes a man healthy, wealthy and
wise"
Efficiency /materialism