Which exponential function is represented by the table? f(x) = 2(2x) f(x) = 0.8(0.8x) f(x) = 2(0.8x) f(x) = 0.8(2x)
2 answers:
Table x f(x) -2 0.2 -1 0.4 0 0.8 1 1.6 2 3.2 Look that the pair of data (0, 0.8), it means f(0) is 0.8 Given
that a^0 = 1, means that the coefficient of the function has to be 0.8
and you discard the first and the third options. You have to replace the values of x in the equations and compare the results. For f(x) = 0.8 * (2^x) you get x f(x) = 0.8 * (2^x) -2 0.8 * (2^-2) = 0.8 / 4 = 0.2 -1 0.8 * (2^-1) = 0.8 / 2 = 0.4 0 0.8 * (2^0) = 0.8 * 1 = 0.8 1 0.8 * (2^1) = 0.8 * 2 = 1.6 2 0.8 * (2^2) = 0.8 * 4 = 3.2 As you can see these results are the same of the table of the question, so the function is f(x) = 0.8 (2^x). Answer: f(x) = 0.8 * (2^x)
Answer: f(x) = 0.8(2x)
Step-by-step explanation:
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