Question

Is sarah faster than Katie? and what is the average rate?​

Answer 1

Step-by-step explanation:

here's the solution: -

Average time taken by sarah :

=》

$\frac{79 + 70 + 68 + 75 + 69 + 64 + 69 + 75 + 64 + 76}{10}$

=》

$\frac{709}{10}$

=》

$70.9$

average time taken by sarah = 70.9 seconds

now,

average time taken by katie :

=》

$\frac{ 79 + 79 + 76 + 81 + 89 + 76 + 64 + 85 + 82 + 78}{10}$

=》

$\frac{789}{10}$

=》

$78.9$

average time taken by katie = 78.9 seconds

so, sarah is more efficient (faster) than katie.

i agree with sarah.

cuz, she took less time than katie.

Answer 2

Answer:

1.

Looking at the data distribution, we see that Sarah has mostly scored under  79 seconds (9 out of 10 results) and Katie has mostly scored over 78 seconds (9 out of 10 results).

This confirms Sarah is faster.

2.

Sun City population average rate of change:

• (9500 - 20000)/(1995 - 1980) = -10500/15 = -700

This is indicating that between 1980 and 1995 the population reduced at a rate of 700 people a year.