Keyword Analysis & Research: what does delta mean in math

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does delta mean in math	0.55	0.6	1586	96	28
what	0.3	0.6	3529	46	4
does	1.54	0.2	1196	87	4
delta	1.59	0.9	1570	22	5
mean	0.23	0.1	6104	39	4
in	0.04	0.2	4083	78	2
math	1.11	0.6	6394	61	4

Keyword	CPC	PCC	Volume	Score
what does delta mean in math	0.79	0.7	4516	67