Answer:

Step-by-step explanation:
Just Square the numbers like a normal equation.
4² = 16
9² = 81
This gives us 
or 0.198 as a decimal (approx)
Answer: Yes
This graph passes the vertical line test. This is a test where we try to draw a single vertical line through more than one point on the curve. In this case, such a thing is not possible. Any input x leads to exactly one output y. This graph is a function.
Answer:
0.0625 kg per bag
or 1/16th of a kilogram per bag
Step-by-step explanation:
You'd need to divide the total amount the the number of sections.
In this case, it'd be 0.5 kg/8 bags, resulting in 0.0625 kg of flour per bag.
I hope this helps!
Hmm, seems to multiply by 5
wait, no
first is multiply by 5
2nd is multiply by 10
3rd is multiply by 15
4th is multiply by 20
seems to be

or

the rule is square the input then multiply by 5