Use the substitution method to solve the system of equations. choose the
correct ordered pair.
y = 3x - 4
x = 9
o a. (9,31)
o b. (1,-1)
o c. (0,-4)
o d. (9,23)

D:  (9, 23)

Step-by-step explanation:

Substitute the given value, 9, for x in y = 3x - 4.  We get:

y = 3(9) - 4, or y = 23.  Thus, the solution is (9, 23) (Answer D)

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)