+845 
so far for this querstion i simplified the line to y=-3/4x + 3 and identified the intersect of (4,0) and (0,3)
https://www.desmos.com/calculator/i0vbehvizi
knowing that the magnitude is 5/2 i'm guessing the solve would be to form a triangle with intersects, the line and point B which would be 5/2 away from 0
but i don't know how to find the point B using the magnitude, please help thanks
