How to interpret graph 1/object distance (U) vs 1/image distance (V)... What type of graph is this? and what does it represent? What does the straight line represent? How do I work out the gradient of my graph? What does the gradient represent? How do I incorporate the formula y = mx + c or 1/V = 1/f - 1x 1/U?
 vs Image Distance (V).png)
The independent variable, the distance between the illuminated object and the thin converging lens (U) is plotted on the x-axis.
The dependent variable, the distance between the thin converging lens and the image (V) is plotted on the y axis.
This graph shows Gradient = Rise/Run