linear method

double linear(double x, { required double begin, required double end, })

It applies the Linear Interpolation formula [click to read more about it](https://www.cuemath.com/linear-interpolation-formula/) It can be used to create animations example: F(x) = y0 + ((y1 - y0) / (x1 - x0)) * (x - x0);

Implementation

double linear(
  double x, {
  required double begin,
  required double end,
}) {
  return begin + ((end - begin) / (this.end - this.begin)) * (x - this.begin);
}