To Investigate the Relationship Between Yield of Soybeans and the Amount

Multiple Choice

To investigate the relationship between yield of soybeans and the amount of fertilizer used, a researcherdivides a field into eight plots of equal size and applies a different amount of fertilizer to each plot. The tableshows the yield of soybeans and the amount of fertilizer used for each plot. $\begin{array}{l|cccccccc}\text { Amount of fertilizer (pounds) , } & 1 & 1.5 & 2 & 2.5 & 3 & 3.5 & 4 & 4.5 \\\hline \text { Yield of soybeans (pounds) , } \mathrm{y} & 25 & 21 & 27 & 28 & 36 & 35 & 32 & 34\end{array}$

A) $r = 0.819$ ; linear relation exists
B) $r = 0.729$ ; no linear relation exists
C) $\mathrm { r } = 0.683$ ; linear relation exists
D) $r = 0.683$ ; no linear relation exists 5 Explain the difference between correlation and causation.