Answer:
Option A: f(x) = log_0.98 (n/74)
Step-by-step explanation:
We are told that that the number of species is decreasing by 2% per year.
Thus, number of species each year is 98% or 0.98 of number of species the previous year. .
We are told that there are currently 74 species of amphibians in the rain forest.
Thus, n/74 will represent a fraction of the current number of species.
Thus, the logarithmic function that models the time can be written as;
f(x) = log_0.98 (n/74)
Ok so…. The “x” line goes horizontal and the “y” line goes diagonal. First thing you want to look at is if there’s a negative sign, the line is going to be pointing left like this:
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From the center of the graph (called the origin) count up 5 units and left 2 units. Then graph that point. Then to graph another point, from the origin, move right 2 units and down 5 units then plot a point. Your graph should look kind of like this:
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Remember: you know you did this correctly when you can draw a STRAIGHT line that connects all the dots
Hope this helped :)
432/100 is 4.32
4.32x45 is 194.4
answer: $194.40