Checking the math in RI GOP Senate candidate Barry Hinckley's "economics for 5-year-olds" campaign spot

Citizen journalist John McDaid looks at RI Republican Senate candidate Barry Hinckley's campaign spot in which Hinckley's five-year-old son gives a lecture on economics and gas prices. The spot resulted in some pretty weird stuff (McDaid describes the "bizarre followup interview he and his son gave with Fox's Neil Cavuto, where Hinckley appeared to be lip-synching his son's responses like Fats in Magic"), but really takes issue with the frankly misleading gas-price chart shown in the ad.

I can understand that a five-year-old doesn't know enough to label both the axes, or make sure his line crosses the origin. And, granted, I'm a bit of a chart geek (after all, I slammed the chair of the Portsmouth School Committee for showing a chart with a distorted Y axis). But that's just not what the shape of the line looks like, either in outline or detail. Based on numbers from the US Energy Information Administration, it should look like this chart over here.

Economics for five-year-olds; data visualization for adults