What sandwich had the least amount left 2/3 chicken, 3/4 tuna, 7/12 roast beef, 5/6 veggie

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval