Without viewing the actual graph, I can provide guidance based on common trends in tuition over time. However, the correct answer depends on the specific data presented in the graph.
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Tuition rates have increased faster than inflation: This claim could be valid if the rate of increase in tuition is consistently higher than the inflation rate shown for the same period.
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The tuition has increased steadily over this time span: This claim would be valid if the graph shows a consistent upward trend without any declines.
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Tuition increased twice as much from 1997 to 1998 as it did from 1996 to 1997: This claim would only be valid if the numerical increase from 1997 to 1998 is exactly double that of the increase from 1996 to 1997.
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The rate of tuition inflation will decrease in the next 5 years: This claim is speculative and cannot be confirmed from historical data alone unless there are clear trends indicating a decrease in the future.
To determine the valid claim, you will need to consider the specific increases shown on the graph for each year. If tuition consistently rises and has noticeable increments, then options regarding steady increases may be valid. If the increase from 1997 to 1998 is double that of the previous year, then that option becomes valid as well.