Which of the following is the equation of a direct variation that has a constant of variation equal to - 1/2?
a. y = x - 1/2
b. 1/2- y = x
c. y = -2 x
d. y = -1/2 x

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)