|Hypothesis 1:|The coefficient on GDP is negative.|

|Hypothesis 2:|The intercept term is equal to –4.|

|Hypothesis 3:|A 2.6% increase in the CPI will result in an increase in sales of more than 12.0%.|

|Hypothesis 4:|A 1% increase in industrial production will result in a 1% decrease in sales.|

Can someone explain why Hypotheses 1 is a one tailed test? i thought it would be = or =/ to negative so that would be a two tailed test?