pls help I WILL MARK BRAINLIST IF CORRECT!! :)

Answer:
Step-by-step explanation:
The longest string is shown as 14 inches; the shortest is shown as 6 inches. So, the difference between longest and shortest is 14-6 = 8 inches, not 14.
The dot plot* shows there are 4 12-inch strings, and 2 8-inch strings. Thus there are twice as many 12-inch strings as 8-inch strings.
The total length of string is ...
6 + 2×8 + 4×12 + 14 = 84 inches . . . (not 100 inches)
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* I would not call this a "line plot." The only line is the number line. This is generally called a "dot plot" or "histogram."