# Category: Graphs

### Finding the Equation of a Parabola

To find the equation of a parabola, you need some specific data points from the parabola. The following 2 scenarios describe this process. SCENARIO 1 – YOU HAVE THE VERTEX. read more…

### Domain & Range of a Function

Sometimes you are given a function on a graph and asked to find the domain and range of that function. But what are the domain and the range of a. read more…

### Frequency Polygons

A frequency polygon is a line graph that is based on a frequency table. Frequency polygons are similar to histograms. Here is an example below.

### Box Plots

Box plots are used to represent the 5 data items listed below graphically, which are: Lowest value in the dataset Lower Quartile (LQ) Median Upper Quartile (UQ) Highest value in. read more…

### Cumulative Frequency Diagrams

The next step after completing your Cumulative Frequency table is to draw a Cumulative Frequency Diagram; and the question that is most likely to come up is to find an. read more…

### Best Fit on a Scatter Diagram

When drawing a ‘best fit’ line on a scatter diagram, you need to keep in mind a few points as these will determine whether you best fit line will be. read more…

### Scatter Diagrams

A scatter diagram is a way of visually representing information on two variables on a graph. You can get 3 possible outcomes with scatter diagrams, these are: Positive correlation: Both. read more…

### Estimate the Area under a Curve

When estimating the area under a curve, you need to split the area under the curve into a number of distinct shapes; the total area of those shapes will give. read more…

### Direct & Inverse Proportions

Sometimes you are told that 2 quantities (or values) are directly proportional (or inversely proportional) to one another. This means that there is a relationship between the two quantities; and. read more…