[{"question":"Normal form of a line in R2","choices":["n · x = n · p OR n · (x - p) = 0","ax + by = c","x = p + td","x = p1 + td1, y = p2 + td2"]},{"question":"General form of a line in R2","choices":["n · x = n · p OR n · (x - p) = 0","ax + by = c","x = p + td","x = p1 + td1, y = p2 + td2"]},{"question":"Vector form of a line in R2","choices":["n · x = n · p OR n · (x - p) = 0","ax + by = c","x = p + td","x = p1 + td1, y = p2 + td2"]},{"question":"Parametric form of a line in R2","choices":["n · x = n · p OR n · (x - p) = 0","ax + by = c","x = p + td","x = p1 + td1, y = p2 + td2"]}]