Answer:
Step-by-step explanation:
Perpendicular lines are lines whose slopes are the negative reciprocal of each other.
So, in this case, the other line's slope is [tex]-10[/tex]
Now we can use
[tex]y = mx + b\\y = -10x + b\\9 = -10(3) + b\\9 = -30 + b\\b = 39\\y = -10x + 39[/tex]
