-21
Step-by-step explanation:
27, 15,3, -9,
15 - 27 = - 12
3 - 15 = - 12
-9 - 3 = - 12
Hnece, Common difference d = - 12
Next term = - 9 + (-12) = - 9 - 12 = - 21
i believe that the slope of the line is -5
step-by-step explanation: