Eddie the elephant gains about 28 pounds per week on average. this past week, which was the 13th week of weighing in, he weighed 2,750 pounds what is the independent variable

The independent variable is 28.

Step-by-step explanation:

An independent variable is something that you change, to change a dependent variable. As the two variables we were given gere 2,750, and 28, and know that 2,750 could not have affected the 28, we can conclude that, indeed, it was the 28 that affected the 2,750.

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.