What is the domain of the composite function? {all real numbers} {r | r ≠ 0} {r | r > 0} {r | r < 0}

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9