#16 write the equation of the circle

need

equation of circle is given as

where (h,k) is center of cirlce and r is radius.

so lets figure out it from graph.

as we can see in graph center is at ( -1, 1)

radius is 4 units as shown in graph but we can calculate it. take any point on circle and calculate its distance from center. lets take point (3, 1)

now distance = √((3+1)^2+(1-1)^2)

= √16 = 4

lets put it in equation

(x +1)^2 + (y-1)^2 = 4^2

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

step-by-step explanation: