Change of Rate over Time - Slope

Online

ExploreLearning.com: Slope Activity A

http://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=240

The Slope Activity A Gizmo uses the Change in Rise over the Change in Run formula to find the value of the slope of the line. Adjustable sliders make it simple to see the effect that a change in the Rise or Run value has on the overall slope of the line. Easily manipulatable and excellent visual representation of the concept of slope.

Offline/Local

Microsoft Math (Win)

http://www.microsoft.com/math/default.mspx

Microsoft Math is a very versatile, all-in-one tool. It sports a 2D/3D graphing calculator for graphing equations and functions; a step-by-step math problem solver; a formula and equation library for quick access to commonly used equations and formulas; a triangle solver for exploring the multiple facets of triangles, such as sides and angles; a unit conversion tool; and handwriting support.

OmniGraphSketcher (Mac)

http://www.omnigroup.com/applications/omnigraphsketcher/

OmniGraphSketcher allows users to create simple, yet elegant graphs by simply drawing them, or importing data. Customize the colors and shapes of the lines, label the axes, easily add labels to graph, and export the graph as an image or PDF.