Question

in october 2012, one us dollar could buy about 0.98 canadian dollars.
the exchange rate remained unchanged from oct 2012 to jan. 2013
the us dollar grew stronger against the canadian dollar from oct 2012 to jan. 2013, dec. 2012 to jan. 2013, jan. 2013 to mar. 2013
(chart: value of us dollar vs. canadian dollar, x - axis: month (10/12, 11/12, 12/12, 1/13, 2/13, 3/13), y - axis: canadian dollars per us dollar (0.96, 0.97, 0.98, 0.99, 1.00, 1.01, 1.02, 1.03, 1.04))

Explanation:

Step1: Analyze the graph trend

The graph shows the value of Canadian Dollars per US Dollar over time. From Oct 2012 to Jan 2013, we observe the trend of the line. If the line is increasing, it means the US dollar is growing stronger (since more Canadian dollars per US dollar implies US dollar is stronger).

Step2: Compare with statements

• "The exchange rate remained unchanged from Oct 2012 to Jan 2013": The graph has a changing trend (not flat), so this is false.
• "The US dollar grew stronger against the Canadian dollar from Oct 2012 to Jan 2013": As the line (Canadian dollars per US dollar) increases, US dollar is stronger (since 1 US dollar can buy more Canadian dollars), so this is true.
• Other time - frame statements: We focus on Oct 2012 to Jan 2013.

Answer:

The statement "The US dollar grew stronger against the Canadian dollar from Oct 2012 to Jan 2013" is correct.