Question 432479
Do it like this:
-------------
Slope = -1/2
m = -1/2
--------
Use y = mx + b and the point to find b, the y-intercept
7 = (-1/2)*3 + b
b = 8.5 or 17/2
--> y = (-1/2)x + 17/2 in slope-intercept form
x + 2y = 17 in standard form