determine whether each equation is the equation of a line parallel line, perpendicular to the given line explain your reasoning y=-2/3x +2

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

If a || b and e || f , what if the value of y ?