Find the Largest Open Interval Where the Function Is Changing $( - \infty , \infty )$

Multiple Choice

Find the largest open interval where the function is changing as requested.
-Increasing y = 7x - 5

A) $( - \infty , \infty )$
B) $( - 5 , \infty )$
C) $( - 5,7 )$
D) $( - \infty , 7 )$