Someone do this for 25 points ?

Option C.

Step-by-step explanation:

Slope of the line passing through (1, 1) and (0, 2)

m =

m =

m = -1

Equation of the line passing through point (1, 1) and slope = -1,

y - y' = m(x - x')

y - 1 = (-1)(x - 1)

y - 1 = -x + 1

y = -x + 2

This piece of function is true for x ≤ 1

Similarly, slope of the line passing through two points (1, -1) and (2, -3),

m' =

    = -2

Equation of the line passing through (1, -1) and slope = -2

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

y + 1 = -2x + 2

y = -2x + 1

This piece of function is true for x > 1

Therefore, Option C. will be the answer.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.