Determine whether the relation is a function: {(3,0),(2,-1),(-1,4),(1,-2)} The relation is many to one
The relation is a function
The relation is not a function
The relation is one to many​

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'm sorry mate, but i am not seeing any figures. i am unable to solve this for you.

well, because the $0.25 is an added cost depending on how many minutes, the answer would be y = 30 + 0.25x.