Blux17


1)
rainfall(x) |13.1|11.4|16.0|15.1|21.4|12.9|9.6| 18.2|18.6|
yield(y) |48.5|44.2|56.8|80.4|47.2|29.9|74.0 |74.0|76.8|

in an area of the midwest, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). the data for a 9 year period is given in the table. the equation of the line of best fit for this data is y = 47.3 + 0.78x. how many bushels of wheat per acre can be predicted if it is expected that there will be 17 inches of rain?
a) 5.96
b) 52.06
c) 60.56
d) 65.34

2)
a wheelchair ramp runs 36 inches and rises 3 inches. what is the rate of change?
a) 1\ 12
b) 12
c) 33
d) 39

3)
which set of points is a function?
a) {(0,,,6)}
b) {(1,,,2)}
c) {(1,,,6)}
d) {(2,,,6)}

4)
henry can build 2 birdhouses in 30 minutes. how many birdhouses can he build in four hours?
a) 4 birdhouses
b) 8 birdhouses
c) 12 birdhouses
d) 16 birdhouses