Question

tree growth after ten years
which statement correctly describes the data shown in the graph and the type of observation used?
the ginkgo tree grew 14 feet; this is a qualitative observation.
the bur oak trees growth rate averaged 2.5 feet per year; this is a quantitative observation.
the bur oak tree is twice the height of the ash tree; this is a qualitative observation.
the norway spruce grew more slowly than the sycamore every year; this is quantitative data.

Explanation:

Quantitative observations involve numerical data. The statement about the bur - oak tree's growth rate averaging 2.5 feet per year has a numerical value for the growth rate, making it a quantitative observation. A qualitative observation is non - numerical, like descriptions of color, texture, etc. The gingko tree growing 14 feet is also quantitative, not qualitative. The statement about the bur oak tree being twice the height of the ash tree is quantitative as it involves a numerical comparison. The statement about the Norway spruce growing more slowly than the sycamore is qualitative as it is a non - numerical comparison of growth rates.

Answer:

The bur oak tree's growth rate averaged 2.5 feet per year; this is a quantitative observation.