Warm up
Find the slope (coefficient, rate, ratio, rise/run).
5.
1.) y = 6x ­ 2x + 3
2. A dog barks for 10 minutes. He barks 5 times every minute.
3. x 3 2 1 0 ­1
y 6 8 10 12 14
4. (3, ­4) & (5, 6)
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Sect. 8.6
Content Objective:
• WWBAT to solve systems of linear equations using graphing.
Language Objective:
• WWBAT describe how to use systems of linear equations to solve problems.
Skill Assignment 8.6 pg 417 #6­26 even, 27­30 all You will need graph
Due_____________ paper for the
homework.
2
Andre and Brian were having a race. Brian
runs at a rate of 2 m/s and Andre runs at
a rate of 3 m/s. Since Andre is faster
Brian was given a 10 meter head start.
At what time does Andre catch up to
Brian?
How can we solve this? Any ideas?
3
Page 414
System of linear equations
2 or more linear equations form a system of linear equations.
A solution to the system is any ordered pair that works in all the equations.
Voc
a
Boo b k
d = 2t + 10 & d = 3t
the point (10, 30) is a solution
White Board Time
8
6
4
2
­8 ­6 ­4 ­2 2 4 6 8 ­2
­4
­6
­8
4
How many text messages would I need to make before it did not matter which plan I signed up for?
$30 a month unlimited texting
$5 a month and $0.10 each text message you make.
5