For each problem, select the best response. (a) In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gasoline, you expect to see A. a positive...

(a) In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gasoline, you expect to see




A.
a positive association.


B.
very little association.


C.
a negative association.


D.
None of the above.

(b) If the correlation between two variables is close to 0, you can conclude that a scatterplot would show




A.
a cloud of points with no visible pattern.

B.
no straight-line pattern, but there might be a strong pattern of another form.


C.
a strong straight-line pattern.


D.
None of the above.

(c) You have data for many years on the average price of a barrel of oil and the average retail price of a gallon of unleaded regular gasoline. When you make a scatterplot, the explanatory variable on the
x
-axis




A.
is the price of gasoline.


B.
can be either oil price or gasoline price.


C.
is the price of oil.


D.
None of the above.