Answer:
A. 7.07 units
Step-by-step explanation:
Use the distance formula for coordinates:

Fill in the coordinates accordingly:

which simplifies down to

which is of course

Plug that into your calculator and you'll get the answer
The radius is the distance from the center to any point. The distance from (2,1) to (0,1) is of course 2. The general formula for a circle with radius r and center (a,b) is

In our case we get
Answer:
The relationship shows a direct linear variation with a constant of variation of 1.
Step-by-step explanation:
This is true because the slope of the equation is 1
Answer:
3t-21 hope I helped you! >w<
Answer:
2
Step-by-step explanation:
Slope formula is the difference of the y values divided by the difference of x values. Choose to points. I chose (-2,-1) and (0,3). 3-(-1) is equal to 4. 0-(-2) is equal to 2. 4 divided by 2 is two.