In order to draw the line graph we require several pairs of coordinates ... We use substitution to calculate the values. For example y = 2x + 1 The y value is always '2 lots' of the x value ...

Data is rarely so uniform and predictable that plotting data points creates a perfectly linear arrangement. Scatter charts might have wildly varying plots that create a seemingly random ...

In math and statistics, you may occasionally need to calculate the slope of a line generated by coordinates in the (x,y) format. The slope is a value that indicates the rate at which the y value ...