It takes mildred about 3 minutes to walk 2 blocks. a point has been plotted in the coordinate plane below showing this. plot another point that expresses
an equivalent ratio and explain what it means.
(the coordinate plane is the attachment.)

Draw a line from the origin to this point, then keep going.
Every point on the line you draw expresses the same ratio . . .

                  (2 blocks) : (3 minutes) .

A few other points on the line, which you could mark, are ...

         (6, 4)

         (9, 6)

        (12, 8)

        (15, 10)

       (300, 200)

       (10011, 6674)

At every point, the y-value is 2/3 of the x-value.
It means that the number of blocks that Mildred walks is always
2/3 of the number of minutes she spends walking, until she falls
panting and sweating to the pavement, or reaches the city limits
where there are no more blocks..

If you divide 0.1 and 0.6 you wii get 0.166666 which rounds to .167 which is answer b