You’re in the market for a “Gizmo.” A shop has five Gizmos available to buy, but the shopkeeper has bad news: two of them are malfunctioning, and she doesn’t know which ones are working and which ones ...

With the ongoing shift to new learning standards for math classes statewide, Algebra I students need to know not only how to find a “y-intercept” but what the “y-intercept” represents. The y-intercept ...