Tuesday, September 10th
Please complete the warm up
1. Solve:
2. Is (3,4) a solution to the following system:
3x-4y=12 and -4x=y+2
8
7
3
2
4
1x
Do you know your Vocab?
System of Linear
Equations
Solution of a system of
linear equations
Slope Intercept Form
Y = mx + b
Slope Y-INTERCEPT
GraphingY=mx + b m
Rise
Over
_____________
bThe _________intercept
It’s where you _____ your graph
REVIEW ON RISE AND RUN
DESCRIBE how you would graph given the following slope
Slope = -3Down 3Right 1Or Up 3 Left 1
Graphing
y intercept = 4
Step 1. The y-intercept is 4, so the line contains (0, 4). Plot (0, 4).
Step 3 Draw the line through the two points
•
••
•
Run = 5
Rise = –2
Step 2 Slope =
Count 2 units down and 5 units
right from (0, 4) and plot another
point.
y
Just Watch
Y = -3x = 4
What is the slope?
3 – 5x = y
What is the y-intercept?
What is the Slope?
What is the Equation that represents this line?
Word Problems
Types of Word Problems
Savings Account and how much you put in it each month
Cell phone starting cost and rate you pay each month
Gym membership and a rate you pay each year
Pages you read and how many pages you read each night
Down payment and your monthly payments
m=rate b=starting fee Y=mx+b
How man drawings did each person make
How many shirts and socks you can buy
How many tickets you can buy
How many books you can read
ALWAYS DEFINE YOUR VARIABLES FIRST
X and y will be in your question!
Slope InterceptEquation: Y=mx + b
StandardEquation: Ax+By=C
Slope Intercept Word Problem
Sam and Joe are collecting baseball cards. Sam already had 5 baseball cards and is given 4 new cards each year. Joe only started with 3 baseball cards but is given 6 new cards each month. After how many months will Same and Joe have the same amount? How many cards will they have at that time?
Standard Form Word Problem
Jenna has $100 to spend on 3 new items of clothing. Jeans cost $50 and shirts cost $25. How many jeans can she buy? How many shirts can she buy?
You decide….
You are selling tickets for a high school play. Student tickets cost $4 and general admission tickets cost $6. You sell 525 tickets and collect $2876. How many of each type of ticket did you sell?
Slope – intercept or
Standard
Jessie has $100 to spend at Best Buy. She can only buy 9 items. CD’s Cost $12 and DVD’s cost $20. How many of each can she buy?
Slope – intercept or
Standard
Lexi and Ryan are reading the same book. Lexi is on page 20 and reads 10 pages each night. Ryan is only on page 8 but plans to read 18 pages each night. When will they be on the same page?
Classwork1.Fill out Ticket to
Go! 2.Work on Homework