Question

I GIVE THANKS AND 5 STARS!!
take a look that the screenshot, anyone know the answer??

Answer 1

c. (1,-5) is the answer

Answer 2

substitute each value until the answer is correct

a. 1 = -4 x -5 -1
1 does not equal 19
b. 15 = -4 x 4 -1
15 does not equal -17
c. -5 = -4 x 1 -1
-5 equals -5
just to make sure the last answer is incorrect
d. -7 = -4 x 2 -1
-7 does not equal -9