Learn about straight line graphs with BBC Bitesize KS3 Maths. ... Horizontal and vertical lines (in the form y = c and x = c) Plotted points on a graph are referred to as coordinates.

If pinpoint accuracy is not important, you can simply draw a curve shape to create a graph. Excel offers options for drawing a variety of shapes with circles, curves and straight lines.

(If you were to draw the graph of the expense over time, it would form a straight horizontal line, hence the name.) Say you're preparing a budget plan for a capital project that requires a $15,000 ...