The graph shows the monthly premiums for a 10-year $250,000 male life insurance policy by age of purchase. For example, a 20-year-old male could purchase such a policy for about $10 per month, while a 50-year-old male would pay about $24 per month for the same policy.

a. Explain what the graph tells us about life insurance rates for males at different ages. Explain why life insurance rates might follow this trend.

b. Would it be appropriate to do a linear regression analysis on these data? Why or why not?

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600 400 200 0-부 20 30 40 50 60 70 80 Age Premium