do you mean 4 right and 9 up?
Like 4 i + 9 j
if so
r = sqrt (16 + 81) = sqrt (97)
angle above x axis is theta
theta = tan^-1 (9/4)
write 4R+9U in polar form
3 answers
@Damon Yes, 4R means go four to the right (because its positive) and 9U means go nine up from the four (because 9 is positive)
strangest notation I ever saw ...