Lesson 2: Proportion Flashcards
comparison of two numbers or measurement.
ratio
: in ratio means
is to
An equation showing two ratios that are equal is called a
proportion
It is the relationship between two variables when their ratio is equal to a constant value.
direct proportion
when y is directly proportional to x, the equation is
y = kx
k is a
constant term
anincrease of one variable will also an increase of the other variable, and a decrease in one variable will also the decrease of the other.
direct proportion
It is the relationship between two variables when
their product is equal to a constant value.
inverse proportion
when y is inversely proportional to x, the equation is
y = k/x
in inverse propportion, the constant term is calculated by
k = x*y
if x increases then y decreases orif x decreases, y increases.
inverse proportion
The number of computers to the number of students
direct proportion
The number of plants to the total cost.
direct proportion
Your score in examination to your grade.
direct proportion
The number of workers and the number of days to work
inverse proportion
