A linear trend model, y = 150 + 60t, was created to predict monthly revenue (y, measured in $ thousands) at a startup. Which statement is accurate?
a. Sales are predicted to be $210,000 next month.
b. Sales are predicted to increase until they reach $150,000 and then decrease.
c. Sales are predicted to increase by 60% next month.
d. Sales are predicted to increase by $60,000 next month.