The derivative of a function of a single variable at a chosen input value, when it exists, is the slope of the tangent line to the graph of the function at that point.
Carl S. English Jr. Botanical Gardens (Wikipedia) The Carl S. English Jr. Botanical Gardens (7 acres) are botanical gardens located on the grounds of the Hiram M. Chittenden Locks at 3015 NW 54th Street, Seattle, Washington.