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A global energy council forecasted the expected worldwide wind-turbine electricity generation capacity, in gigawatts (GW), for each of six consecutive upcoming years (Y1 - Y6). For each year, the graph shows the expected installed wind capacity (i.e., capacity that will be newly installed during that year) and expected cumulative wind capacity (i.e., total existing capacity at the end of that year). The graph also shows, for each of installed and cumulative capacity, the percent rate of growth for each year over the previous year.
From each drop-down menu, select the option that creates the most accurate statement according to the information provided.
| Text Component | Literal Content | Simple Interpretation |
|---|---|---|
| Subject Matter | expected worldwide wind-turbine electricity generation capacity | Forecasts of global wind power capacity |
| Data Source | A global energy council forecasted | Predictions come from an international energy council |
| Time Period | six consecutive upcoming years (Y1 – Y6) | Covers six future years |
| Metric: Installed | installed wind capacity (newly installed during that year) | New wind capacity added each year |
| Metric: Cumulative | cumulative wind capacity (total existing capacity at the end of that year) | Total wind capacity at the end of each year |
| Metric: Growth Rates | percent rate of growth for each year over the previous year | How much each value increases (%) compared to the prior year |
| Units | in gigawatts (GW) | All figures are in gigawatts (GW), a measure of power |
| Chart Component | What is Shown | Key Points |
|---|---|---|
| Chart Type | Combo of bars (cumulative) + lines (installed and % growth) | Shows both raw amounts (GW) and growth rates (%) together |
| X-Axis | Years Y1–Y6 | Each point/year is labeled sequentially (no actual dates) |
| Left Y-Axis | 0–700 GW (for capacity) | Used for both installed and cumulative capacities |
| Right Y-Axis | 0–50% (for growth rates) | Used for percent growth rate lines |
| Cumulative Capacity | Blue bars rising from 380 GW to 660 GW | Total installed wind power continually increases |
| Installed Capacity | Line: 50 GW (Y1–Y4), then 60 GW (Y5), 70 GW (Y6) | New installations stay level for 4 years, then increase; never drops |
| Cumulative Growth % | Dashed line decreases from 15% (Y1) to 11% (Y6) | Each year the percentage increase gets smaller |
| Installed Growth % | Dotted line: 45%, then 4%, 3%, 5%, 7%, 6% | Year-to-year additions fluctuate more than cumulative capacity |
From Y1 to Y6 the graph indicates that the expected annual percent rate of growth for cumulative wind capacity will [BLANK 1].
To the nearest 50 GW, the median of the expected cumulative wind capacities from Y1 to Y6 is [BLANK 2].
Both blanks are answered using either direct visual interpretation (for the trend in growth rates) or straightforward computation (for the median). No advanced math is required: trend is visible in the dashed line, and the median requires simply averaging middle values and rounding.
Blank 1 (growth rate trend) and Blank 2 (median capacity value) require separate sets of information from the chart and do not influence each other. Their computations are fully independent.