Linear = function (p0, p1, t)
{
    return (p1 - p0) * t + p0;
}
Calculates a linear (interpolation) value over t.

@function Phaser.Math.Linear
@since 3.0.0

@param {number} p0 - The first point.
@param {number} p1 - The second point.
@param {number} t - The percentage between p0 and p1 to return, represented as a number between 0 and 1.

@return {number} The step t% of the way between p0 and p1.