Verify that if each xi is multiplied by a positive constant c and each yi is multiplied...

Verify that if each xi is multiplied by a positive constant c and each yi is multiplied by another positive constant d, the t statistic for testing H₀ = β₁ = 0 versus H_a = β₁ ≠ 0 is unchanged in value (the value of is not by itself indicative of model utility).