Show that an equivalent way to define the test for significance of regression in simple linear regression

Question:

Show that an equivalent way to define the test for significance of regression in simple linear regression is to base the test on R2 as follows: to test H0: B1 = 0 versus H1: B1 = 0, calculate

And to reject H0: B1 = 0 if the computed value f0 > fa, 1, n 2.|