Step-by-step explanation:
Since it's a direct variation
y = kx
where k is the constant of proportionality
To find the value of y when x = –0.5 we must first find the relationship between the variables
When
x = 3
y = 2
2 = 3k
Divide both sides by 3

So the formula for the variation is
<h3>

</h3>
When x = - 0.5 or - 1/2

We have the final answer as
<h2>

</h2>
Hope this helps you
Answer:
Step-by-step explanation:
where is exercise 4-9?
or at least give us the equation
This is the well known Monty Hall problem.
You have more chances of winning by switching doors.Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on
By Baye's formula,

whereas

!!