I’ve tried working it out but i’m still having a lot of trouble with this.

Greetings!

Convert the equation to slope y-intercept form:






The Slope of this equation is represented by 2 (or ). In order to create a line perpendicular to this line, they must have negative reciprocals. The formula for this is:  (m represents the slope each line). 

Input the values we know:


Solve:






Arrange the new equation in slope y-intercept form:


Input a coordinate point into the equation:


Solve








The y-intercept is equal to

Now using the information we have, arrange the equation in slope y-intercept form:


Hope this helps!
-Benjamin