from typing import Tuple


def perp_mx_plus_b(
    m_slope: float, point_on_line: Tuple[float, float],
) -> Tuple[float, float]:
    """
    Returns a tuple representing the values of "m" and "b" from
    for a line that is perpendicular to 'm_slope' and contains the
    'point_on_line', which represents an (x, y) coordinate.
    """
    m_perp = -1 / m_slope
    p_x, p_y = point_on_line
    b_intercept = p_y - m_perp * p_x
    return (m_perp, b_intercept)