RMontgomery

freakingout...

here you would have

H0: b1 <= 5
Ha: b1 > 5

you would accept it if b1 <= 5... right.

so your rejection region is to the right... Look at the Alt to determine your rejection / acceptance region.

Two tailed:
H0: b1 = 5
H1: B1 <> 5

same thing => at the extremes are the rejection region.

CP