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How do I plot the second coefficient (not including the intercept into a plot) can I choose which coefficient to draw with abline?

I am running a time series regression by doing:

ts(Regression.data, frequency = 12, start=c(2012,10))

and then running:

attach(Regression.data)
model <- lm(logsalesUK ~ time(Date) + Exchangerate)
plot(Exchangerate, logsalesUK)

I would like to return the regression line using:

abline(model)

However this returns the date regression line. Can someone explain to me how to choose the exchange rate regression line to the plot?

—bonus question—

Is this time series regression taking into account the seasonality specified in the ts function? (see above)

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