+the answer is $340 to find the answer you need to take $600 and since its twice the cost plus $40 you divide $600 by 2 then you add $40 $600/2 +$40=$340
C because 6-3=3-1/4=2 3/4 so c
9.625 in decimals hope this helps
The slope is: -3/2 and we get this by doing (y2-y1)/(x2-x1).
