Which statements give the correct constant of proportionality as y = kx?
Choose the correct answers.

1) It takes 5 cans of paint (x) to cover 10 dog houses (y).
y = 2x

2)A lawn service charges $258(y) for mowing 6 yards (x).
y = $43x

3)8 pounds of beef (x) costs $78 (y).
y = $9x

4)Beverly can reads 315 pages (y) in 7 hours (x).
y = 45x

5)10 chocolate bars ( x) contain 3,330 calories (y).
y = 333x

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.