If you divide 21/49 by 7 you get 3/7
We know, Length of Image = Length of Object * Dilation factor,
Just substitute your known values,
Length of Image = 9 * 2 = 18
In short, Your Answer would be 18 cm
Hope this helps!
Answer: The first one is not a function the second is a function the third one is not one and the fourth one is
Step-by-step explanation: