Answer:
y = -x + 7
.. lots of possible answers
Explanation:
y=mx+c
c is also known as b
c = b
Same gradient lines are parallel
m = gradient
x = x-axis
y = y-axis
c = y-intercept OR b
y = 6 -x
Rearrange
y = -x + 6
PARALLEL LINE EXAMPLE:
y = -x + 7
.. c can be any number, but gradient must remain