The true statement when discussing the key features of a linear graph is:
The points will make a straight line.
In a linear graph, the relationship between the variables is linear, meaning the plotted points will form a straight line.
The other statements are not necessarily true:
- The points always have positive values: This is not true; points can have negative values depending on the context of the graph.
- The initial value is always zero: This is not true; the initial value (y-intercept) can be any number.
- The rate of change can vary along the graph: This is not true for a linear graph; the rate of change (slope) is constant.