(refer to pic below)

Average speed = 0.09 meter per second.

Step-by-step explanation:

Formula used to find the average speed,

Average speed =

From the graph attached,

Total distance covered from t = 0 and t = 45 seconds

= 4 m

Time elapsed during the journey = 45 - 0 = 45 seconds

Average speed =

                          = 0.09 m per second

Therefore, average speed is 0.09 m per second.

43

step-by-step explanation:

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.