Final answer:
In the IS-LM model that takes into account dynamics, an increase in government spending will cause a gradual increase in i and gradual increase in Y.
Step-by-step explanation:
In the IS-LM model that takes into account dynamics, an increase in government spending will cause a gradual increase in i and gradual increase in Y. This is because an increase in government spending will shift the Aggregate Demand (AD) curve to the right, leading to an increase in both the interest rate (i) and the level of output (Y) in the long run.