by salma17
Tags: function, word
 P: 372 I agree with the first one. Regarding the second, what year does t=4 correspond to? Question 8 is ambiguous because it doesn't specify the units you should use for the rate. I would assume billions of dollars per year, though. You've just calculated the change, not the rate of change. I don't think your last answer is right, either - think about what you are calculating in 8.
 P: 49 0hh right. for 8) the rate of change is found by:m = (y2-y1)/(x2-x1) so I plugged 2 in the equation first(because 1996-1994=2yrs), getting 48. so my first point is (2,48). Then I plugged in 4(1998-1994), getting 70. so my second point is (4,70). so for the rate of change i ended up with 22/2 which is 11. So it would be D. for number 9, would it be E then?
P: 49

and for 7) I got C
 P: 372 Agreed on all questions now. Questions 8 and 9 are very poor. Because 8 doesn't specify any units, any number will do. For example, the correct answer is $11bn/yr. But this can also be written as$22bn/two years, or $5.5bn/six months. Any number will do because you can hide the matching fiddle factor in the units. The kicker is that for question 9, E is correct if you use$11bn/yr, but D is correct if you express the same value in other units. This is why units are important, kids. Rant over.

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