He uses
jse a
understand proportional relationships
example showing proportional relationships
prerequisite: understand
study the example showin
in a table and a graph. then solve problems
onal
describe
12 14 16
3 3.5 4
- paint you
example
bottles of water cost $2 each. is the
relationship of the cost to the number of
bottles a proportional relationship?
y is 4.
you can use a table or a graph to see
whether the relationship is proportional.
total cost (5)
8
number of bottles
total cost (s)
total cost
number of bottles
0 1 2 3 4 5 6 7
number of bottles
all of the ratios in the table are equal to?
this is the unit rate and means that it costs $2 for one bottle
of water. the graph is a straight line through the origin (0,0).
so this is a proportional relationship.
anni pm
what is the cost of 12 bottles? explain.
how do i start the problem