Find the are of circle with a diameter of 4

Hi there!

The general formula used to find the area of a circle is :

A = × r²

Since you know the diameter of the circle, you need to divide it by two in order to know what your radius (r) is :

4 ÷ 2 = 2

Now that you know that your radius (r) is 2, replace it in the formula and solve the equation :

A = × 2²

A = × 4

A ≅12.57

There you go! I really hope this helped, if there's anything just let me know! :)

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is