1. which of the following represents a function? x -2 -1 0 -1 -2 y 2 3 4 5 6
x 1 1 0 2 2 y 1 2 3 4 5
x 1 2 3 4 5 y 2 2 3 3 4
x 1 1 1 1 1 y 2 3 4 5 6
2. what is the domain of the function: {(2, 1); (4, 2); (6, 3); (8, 4)}? {1, 2, 3, 4} {1, 2, 3, 4, 6, 8} {2, 4, 6, 8} {6, 8}
3. what is the range of the function: {(2, 1); (4, 2); (6, 3); (8, 4)}? {1, 2, 3, 4} {1, 2, 3, 4, 6, 8} {2, 4, 6, 8} {6, 8}
4. suppose p varies directly with d, and p = 7 when d = 3. what is the value of d when p = 28? 4/3 12 16 140/3
5. given the function t(z) = 7 − z, find t(−4). −11 11 −3 3 6. what is the equation of the graph?
f(x) = − |x| + 2 f(x) = − |x| − 2 f(x) = − |x + 2| f(x) = − |x − 2| 7. the number of calories burned, c, varies directly with the time spent exercising, t. when dennis walks for 4 hours, he burns 800 calories. which of the following equations shows this direct linear variation? c = t c = 800t c = 4t c = 200t
"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.
Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. david estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x.