To open the calculator, you simply have to search ... which is the slope of the line, and watch the graph pivot around the y-intercept. Similarly, you can change the value of c, which is the ...

Python allows free creation of plots, unlike expensive, stagnant graphing calculators. Import NumPy and Matplotlib for basic ...

[Photo: Christopher Mitchell] A quick show of hands: How many of you used a graphing calculator in school? Now, how many of you used it more to play games than to solve problems? If you still ...