Question

Express in general form- y=-1/2x-9

Answer 1

add 9 to both sides:
y+9= - 1/2 *x ... is it -1/2x or x* (-1/2)

Answer 2

im not sure

Answer 3

ok...
if y=(-1/2)*x -9 (i hope this is your problem)
add 9 to both sides:
y+9=(-1/2)*x
multiply both sides by (-2):
x=-2*y -18 put all on one side:
2y+x+18=0