id	keyword
easat-4521	function
easat-4521	derivative
easat-4521	graph
easat-4521	understanding
easat-4521	subject
easat-4521	vol
easat-4521	students
easat-4521	function graph
easat-4521	apos
easat-4521	mathematics
easat-4521	function derivative
easat-4521	process