1. - 4 =
=> x = - 36
___________
2. -18 = 6t
=> t =
=> t = -3
___________
3. x - 18 = -72
=> x = - 72 + 18
=> x = - 54
___________
4. -18 = x - 15
=> x = -18 + 15
=> x - 3
HELP!!! Which graph best shows the function f(x) = 4(3)−x to represent the rate at which a radioactive substance decays?
1 answer:
Answer:
B
Step-by-step explanation:
The exponential function has the form where a is the starting value or y-intercept. B is the rate of change and x is the variable typically time. In this situation,
has starting value 4, rate 3 and a -x.
Normally an exponential curve glides left to right growing steeper as it goes. But a -x flips this behavior. The curve starts very steep then gradually slows down. This means only graphs B or D are options. Since only graph B of these two has a y-intercept at 4, graph B is the solution.
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