The square footage and monthly rental of 15 similar two-bedroom apartments in Martha's Cove yield the following linear regression formula: y = 1.137x + 598.98 where x represents the square footage of the apartment and y represents the monthly rental price.
a. Use the formula to determine the monthly rent for an apartment that has 1800 square feet.
b. Using the recommendation that you should spend no more than 28% of your monthly gross income on housing, can Stephanie afford this rental if she makes $9,800 per month? Explain.