Question

Graph the function f(x) = 5(0.21)x.
an exponential graph decreasing from the left and crossing the y axis at 0 comma 21
an exponential graph decreasing from the left and crossing the y axis at 0 comma 5
an exponential graph decreasing from the left and crossing the y axis at 0 comma 18
an exponential graph decreasing from the left and crossing the y axis at 0 comma 8

Answer 1

Answer:

This is an exponential graph decreasing from the left and crossing the y-axis at 0 comma 5.

Step-by-step explanation:

The given function is $f(x) = 5(0.21)^{x}$

Since, the base of the function is 0.21 which is a fraction, so as the value of exponent x increases the value of function f(x) decreases.

Now, the y-intercept of the function is at x = 0 ans hence, $f(x) = y = 5(0.21)^{0} = 5$ {Since, $a^{0} = 1$ for all a ≠ 0}

Therefore, the graph of the function crosses y-axis at (0,5) point.

So, this is an exponential graph decreasing from the left and crossing the y-axis at 0 comma 5. (Answer)  

Answer 2

Answer:

The answer is b