Answer: The slope of the line using two points where the line goes through is 1/4.
Solution:
m=(y2-y1) / (x2-x1)
Taking two points in the graph where the line goes through:
P1=(0,6)=(x1,y1)→x1=0, y1=6
P2=(8,8)=(x2,y2)→x2=8, y2=8
Replacing in the formula of the slope:
m=(8-6) / (8-0)
m=2/8
Simplifying the fraction dividing the numerator and denominator by 2:
m=(2/2) / (8/2)
m=1/4