Question

BRAINLIESTTT ASAP!!! PLEASE HELP ME :)

Answer 1

Answer:

$\large \boxed{\text{\ 15.22/yr}}$

Step-by-step explanation:

The average rate of change is the change in weekly earnings divided by the change in time.

1. Change in earnings  

Change in earnings = $549 - $412 = $137

2. Change in time

Change in time = 1999 - 1990 = 9 years

3. Average rate of change

$\begin{array}{rcl}\text{Average rate of change} &= &\dfrac{\text{change in weekly earnings}}{\text{change in time}}\\\\&= &\dfrac{\text{\ 137}}{\text{9 yr}}\\\\& = & \textbf{\ 15.22/yr}\\\end{array}\\\text{The average rate of change in weekly earnings was \large \boxed{\textbf{\ 15.22/yr}} }$

Answer 2

Answer:

Let D represent the average rate of change between 1990 and 1999

D ≈ 33%

Step-by-step explanation:

412+412×(Ｄ÷100 )= 549

⇔ 412×(Ｄ÷100) = 549 - 412

⇔ 412×(Ｄ÷100) = 137

⇔ Ｄ÷100 = 137÷412

⇔ Ｄ÷100 = 0.332524271845

⇔ D = 33.2524271845.

:)