Solve the problem.The table below summarizes the construction cost of a set of homes (excluding the lot cost) along with the square footage of the home's floor space. Find a linear equation that relates the construction cost in thousands of dollars to the floor space in hundreds of square feet by finding the least squares line for the data.
A. y = 8.13x
B. y = 7.87x - 13.08
C. y = 8.13x - 12.79
D. y = 7.97x - 13.54
Answer: D
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Find the second derivative of the function.r = 
(4 - ?)
A. 
= 
B. 
= - 
- 1
C. 
= - 
- 1
D. 
= 
- ?
Apply the Power Rule and simplify the expression. Write the result with positive exponents only.(y-9)0
A. 0
B. -1
C. 1
D. 
Evaluate the given integral.
?
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Assume that from 1930 to 1980, the number of deaths from lead poisoning (per 100,000 people) decreased dramatically and could be modeled by 
where x is the year. Determine when, to the nearest year, this death rate was 150 or less by graphing y = f(x) and 
in [1930, 1980, 10] by [0, 200, 25].
A. 1964 or after B. 1960 or after C. 1973 or after D. 1967 or after