15 22 205 64 Solutiona First part 1 5 and 22 slope 5212

Solution

a) First part: ( 1, 5) and ( 2,2)

slope = (5-2)/(1-2) = -3

y = -3x +c----> 5 = -3*1 +c

c= 8

So, y = -3x +8 for x< = 2 ---> ( -inf, 2]

IIn d Part

Two points : ( 2, 0.5) and ( 6,4)

Slope = ( 4 -0.5)/( 6-2) = 3.5/4 =0.875

y = 0.875x +c .find c using ( 6,4)

4 = 6*0.875 +c -----> c= -1.25

y = 0.875x -1.25 for x> 2 ---> ( 2, inf)