1.7 and 1.8
Ordered Pairs
It costs $5 to get into the county fair. Each ride costs $1.
Let y be the total amount of money you spent at the fair
and x be the number of rides you rode.
Write an equation for your total cost in terms of the
number of rides you rode.
Find the total cost if you rode 3 rides.
Find the total cost if you rode 6 rides.
** A solution of a two-variable equation is written
as an ordered pair.
So, two solutions for the equation y = 1x + 5 are:
Using our same equation, y = 1x + 5
We can determine if certain ordered pairs are
solutions of the equation...
Is (8, 15) a solution of the equation?
Show work to support your answer!
Is (12, 17) a solution of the equation?
Show work to support your answer!
Using our same equation, y = 1x + 5
We can make a table of values to show
some of the solutions.
(input) (output)
x
1
2
3
4
5
8
10
12
y
When we have a table of values for our equation y = 1x + 5
we can plot the points on a coordinate plane
to show all of the solutions to the equation!
(input) (output)
x
1
2
3
4
5
8
10
12
y
6
7
8
9
10
13
15
17
15
10
5
5
10
15
Graph the solutions for the equation
y = 2x + 3
x
y