proportion:
Constant:
product rule:
Inverse variation:
function equation:
Table:
Graph:
TABLE:
Does the table show an inverse variation? Explain
x
y
­2
­6
1
12
2
6
3
4
1
Does the table show an inverse variation? Explain
x
y
­2
­6
­1
­3
1
6
2
3
Y varies inversely with x. When y = 6, x = 4
What is the constant?
Write this inverse variation in equation form.
What is the value of y when x = 8?
2
Y varies inversely with x. If y = 12, then x = 6
What is the constant?
What is the function equation?
What is the value of y when x = 8?
Sandra has $40 saved from her allowance this month to rent movies and buy books. If she buys 6 books, she will only be able to rent 2 movies.
What is the constant?
What is the function equation?
How many movies will she be able to rent if she only buys 4 books?
3
It normally takes Jessica 45 minutes to get to her friend's house 20 miles away.
What is the constant?
What is the function equation?
Tomorrow she is meeting her friend at the mall, which is 28 miles away from her house. If she travels at the same rate she normally travels, how long will it take her to get to the mall?
4