Why are graphs useful when interpreting data?

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.

Technology can bring both good and bad things. pesticides can make crops more resistant to insects (good) but can harm humans if they are used improperly (bad). give examples of both the good and bad

Why is there more biomass at the producer level that at the consumer levels ? how does this relate to the 10% rule ?