In a coin collection, the number of nickels is 8 more than twice the number of quarters. If the collection has 42 nickels, how many quarters are in the collection?

your question is incomplete, write all the numbers in the sequence that it tells you.  

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).