Solve the problem.Two separate tests are designed to measure a student's ability to solve problems. Several students are randomly selected to take both tests and the results are shown below. Find the equation of the least-squares regression line that models the data.
A. y ? -0.930 + 19.4x
B. y ? 19.4 + 0.930x
C. y ? 0.930 - 19.4x
D. y ? -19.4 - 0.930x
Answer: B
Mathematics
You might also like to view...
Determine whether the given number is approximate or exact.The ammeter showed a reading of 0.18A.
A. Approximate B. Exact
Mathematics
For the functions f and g, find the requested value.Evaluate (g ? f)(-2).y = f(x)y = g(x)
?
A. -2 B. 2 C. 1 D. -0.5
Mathematics
The concentration (in milligrams/cubic centimeter) of a certain drug in a patient's body t hr after injection is given by
?
interval where 
is decreasing.
?
When is the concentration of the drug increasing and when is it decreasing?
?
A. Increasing on 
B. Increasing on 
and decreasing on 
C. Decreasing on 
D. The concentration of the drug is constant.
Mathematics
Simplify the expression.x2y-4
A. x2y4
B. 
C. 
D. x2y12
Mathematics