Answer:
y=-2x
This type of equation is a form of a direct proportion.
Answer:
Answer in the pic with steps
Hope it helps
Answer:
True
Step-by-step explanation:
Considering the above definition of Pooled Variance, the correct answer is TRUE.
This is because Pooled variance is used to determine the reasonable estimates of variance, where several repeated tests are expected at each value.
This helps to provide greater precision estimates of variance.
Answer:

Step-by-step explanation:
we know that
The scale is 
That means
2.4 cm in the model represent 1 foot in the real
In this problem
The restaurant is 20 feet tall
Find the height of the model
Multiply the actual height of the restaurant by the scale 2.4

A bottle cap is 1.2 cm tall
To find out the number of bottle caps divide the height of the model by 1.2

In the attached diagram you can see the graph of the function 
As you can see graph is:
1. increasing from x = −2 to x = −1
2. decreasing from x = 0 to x = 1
3. decreasing and then increasing from x=1 to x=2
4. increasing from x=2 to x=4.
Answer: correct choice is B.