Hi there!
We are given a point that the line passes through and the slope of the line, so we can use Point-Slope Form:

In this case, y₁=7, m=9, and x₁=2.
Plug in the values:

Now, turn it into Slope-Intercept:

Move -7 to the right:

Add:
(Answer)
Hope it helps!
Enjoy your day/night!
Please feel free to ask if you have any doubts.
-Sparkles-