Technically, everything we know was made up by our own minds. We thought of it all. We decided that the color of the sky would be called "blue" and not "doorknob". Education is a continuous cycle that never stops progressing.
The period of a sinusoid

is

, so any range such that

will give two complete periods.
The constant is a number by itself.....no variables
so the constant in y = 4x - 110 is : -110