Which of the following shows the graphic representation of the exponential function f(x)=3^x

Option B is correct.

Step-by-step explanation:

The exponential function is in the form of :

where, a is the initial value and b is the growth rate.

If b > 1 , then the graph is exponentially growth.

If 0< b< 1, then the graph is exponentially decay.

Given the exponential function:

on comparing with [1] we have;

a =1 and b = 3 > 1

⇒ the function is exponentially growth.

y-intercept:

Substitute x = 0 and solve for y:

then;

y-intercept = (0, 1)

or

Initial value = 1

End behavior:

If , then

and

If , then

Therefore, the option B is correct.

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."