Which ordered pair is a solution to y equals 4.5 x +20? a. (5,40) b. (7,52) c. (10,25) d. (12,74)

For this case, what you should do is replace each by ordered in the function and see which satisfies the equality. Substituting we have:
 Y = 4.5 X +20
 A. (5,40)
 40 = 4.5 * (5) + 20 = 42.5
 40 = 42.5 (NO)
 B. (7,52)
 52 = 4.5 * (7) + 20 = 51.5
 52 = 51.5 (NO)
 C. (10,25)
 25 = 4.5 * (10) + 20 = 65
 25 = 65 (NO)
 D. (12,74) 
 74 = 4.5 * (12) + 20 = 74
 74 = 74 (YES)
 
 The ordered pair solution is D. (12.74)