Objective- To graph horizontal and vertical lines.
x y -2 7 -1 6 0 5 1 4 2 3 3 2 4 1 5 0 6 -1 Graph. x+y=5 y
x
x y -2 3 -1 3 0 3 1 3 2 3 3 3 4 3 5 3
Graph. y=3
Line is Horizontal
y
x Any line in the form y = k will be horizontal.
x y -2 -2 -2 -2 -2 -2 -2 -2 -2 -1 0 1 2 3 4 5
Graph. x = -2
Line is Vertical
y
x Any line in the form x = k will be vertical.
Review
Horizontal Line Vertical Line
y=k
Y-axis is vertical, but y = k line is horizontal.
x=k
X-axis is horizontal, but x = k line is vertical.
A) Graph x = -4 on a number line.
-5 -4 -3 -2 -1 0 1 2 3
B) Graph x = -4 on a coordinate plane. y
x
Problem Mac had $580 in his bank account. He mus maintain a balance of $300 to avoid a servi fee. How long can he withdraw $20 per we without paying the fee? x y Let x = # of weeks 0 580 Let y = account balance
5 480 10 380 15 280
Bank Balance Y = 580 - 20 x
Account Balance
Let x = # of weeks Bank Balance Let y = account balance Y = 580 - 20 x x y Minimum Balance 0 5 10 15 580 480 380 280
600 500 400 300 200
Y = 300
100
0 0 5
x = 14 weeks
10 15 20 Weeks 25 30