A circle is centered on point (-2,-1). The circle passes through the point (-7,-7). What is its radius?

-The answer for the radius:

Step-by-step explanation:

-The equation of a circle is:

(where the center is known as , the point is and the radius known as ).

-Use both the center (-2,-1) and the point (-7,-7) for the equation:

-Then, solve the equation to get the radius:

So, therefore the radius is .

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

you'll have to attache the image of the bar graph in order for us to answer : )

step-by-step explanation: