keyword

f of x

Monthly search volume and cost-per-click data for "f of x" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=f+of+x&country=us" +--------------+------------------+ | volume | 1,000 | | cpc | $10 | | competition | 0.24 | | country | US | | updated | 2026-07-01 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
notation of function	14,800	$6.5	12/20
what is f	3,600	$12.84	17/20
function mean in math	3,600	$0	12/20
math function	3,600	$0	12/20
function x math	1,000	$1.58	15/20
function of x	880	$0	15/20
functions of x	880	$0	13/20
what does f/x mean	590	$0	12/20
what does f of x mean	210	$0	12/20
what is fx in math	90	$0	13/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=f+of+x&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt