Mathematics for IGCSE & O level - Statistical Diagrams (Section 5 - No. 26)
What is the formula used to estimate the frequency from a frequency density graph?
Frequency = Class Width / Frequency Density
Frequency = Frequency Density / Class Width
Frequency = Class Width x Frequency Density
Frequency = (Class Width + Frequency Density) / 2
Explication
Frequency = Class Width x Frequency Density