# NOT RUN {
require(graphics)
plot(pressure, xlab = "Temperature (deg C)",
ylab = "Pressure (mm of Hg)",
main = "pressure data: Vapor Pressure of Mercury")
plot(pressure, xlab = "Temperature (deg C)", log = "y",
ylab = "Pressure (mm of Hg)",
main = "pressure data: Vapor Pressure of Mercury")
# }
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