parrell
parallel
They are parallel lines
Up to Mach 2 (= 2x the speed of sound.)
Ground (2x Damage) Fire (2x Damage)
Flying and Psychic do 2x damage to Fighting-type Pokemon.
They are parallel lines with a vertical separation of 1.
out = in+in; /* 2x */ out += out; /* 4x */ out += out; /* 8x */ out -= in; /* 7x */ or out = (in<<3) - in; /* 8x - x */
If you mean y = 2x and y = 2x-1 then they are parallel lines because they have the same slope.
Ice(4x) Dragon(2x)
As stated these are not lines, but just a collection of algebraic terms. If we change them to y=2x and y=2x-1, then on a graph of y versus x, these are parallel lines separated by vertical distance of 1.
Fire types are the best against grass types, grass types are the best against water types, and water types are the best against fire types. I see it as a big rock-paper-scissors video game!