A key feature of the winning app, “Diabetes and Me,” was the ability to graph daily sugar levels. As another example, consider a weight-tracking application that plots progress against a goal ...

All the coordinates have equal values for \(x\) and \(y\). This is shown by the points on the line such as (10, 10) and (-4, -4). Graph A is \(y = -x\). All the coordinates have \(x\) and \(y ...