Vocabulary Review Use the terms in the box to complete the sentences.
1. You can share the results of an investigation with others
by using a(n)
bar graph
evidence
experiment
hypothesis
variable
2. An observation often leads to a testable question
known as a(n)
3. A planned study meant to answer a question is
called a(n)
4. It is very important to test only one
or thing that changes, at a time.
5. A hypothesis should be supported
by the

Let us imagine that the number of automobile accidents in a certain region are related to the regional number of registered automobiles in tens of thousands (b1), alcoholic beverage sales in $10,000 (b2), and decrease in the price of gasoline in cents (b3). furthermore, imagine that the regression formula has been calculated as: y = a + b1x1 + b2x2 + b3x3 where y = the number of automobile accidents, a = 7.5, b1 = 3.5, b2 = 4.5, and b3 = 2.5 calculate the expected number of automobile accidents for a football weekend if the region has 25,000 registered vehicles, $75,000 worth of beer is sold, and a gas war causes a 10 cent drop in a gallon of gas.