Can someone help on this?

part a: c

part b: 4

Step-by-step explanation:

part a:

y+6=5(x-4)

y+6=5x-20

y=5x-20-6

y=5x-26

f(x)=5x-26

part b:

f(x) =5x-26

f(6) =5×6-26

f(6) =30-26

f(6) =4

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.