What is the slope of the line that passes through the points (9, 5) and (21, 1)? Write your answer in simplest form.

-1/3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(1-5)/(21-9)

m=-4/12

m=-1/3

sorry i need the points

step-by-step explanation:

biuuyb i\

uygybg bsyvyuenrs

ufir7gyuuf6

y6fy

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