Sam enters data for weight (in pounds) and weekly food cost (in dollars) of pets into a statistics software package and finds a regression equation of = 0.3 + 0.12x, where weight is the explanatory variable. Based on this information, select Sam's conclusion about food weight and costs that is TRUE.

• a.)For each additional pound of weight, weekly food costs stays relatively the same.
• b.)For each additional pound of weight, weekly food costs increases by 12 cents.
• c.)For each additional pound of weight, weekly food costs increases by 30 cents.
• d.)For each additional pound of weight, weekly food costs decreases by 12 cents.