The function y = k/x: properties and graph
Answers are for parents and teachers.
1
Find the value of y = -8/x at x = 2.
-4
2
A car covers 90 km at v km/h in t = 90/v hours. Find t for v = 45.
2
3
Find k if the graph of y = k/x passes through (-2, 3).
-6
4
What is the ordinate of the point of y = 10/x at x = 5?
2
5
Why does y = 6/x describe an inverse proportionality?
Because xy = 6 is constant: when x grows several times, y shrinks by the same factor.