Finding Equations From Graphs and Real Life Situations

Finding Equations From Graphs and Real Life Situations

Get warmed up… Is the slope: a) Positive b) negative c) zero d) no slope

Get warmed up… Is the slope: a) Positive b) negative c) zero d) no slope

Get warmed up… Is the slope: a) Positive b) negative c) zero d) no slope

Get warmed up… Is the slope: a) Positive b) negative c) zero d) no slope

Challenge #1 Find the Equation from a Graph

#1 C) What is the equation of the line? a) Y = 2 x A)B) What is the y-intercept slope (m)? (b)? b) Y =. 5 x + 1 c) Y = 2 x + 1

#2 C) What is the equation of the line? a) Y = -2 x -1 A)B) What is the y-intercept slope (m)? (b)? b) Y =. 5 x - 1 c) Y = 2 x - 1

#3 C) What is the equation of the line? a) Y = 1 x +2 A)B) What is the y-intercept slope (m)? (b)? b) Y = 2 x c) Y = 2

#4 C) What is the equation of the line? a) Y = 3 x - 1 A)B) What is the y-intercept slope (m)? (b)? b) Y =. 33 x - 1 c) Y = -. 33 x - 1

#5 C) What is the equation of the line? a) Y = 3 x + 2 A)B) What is the y-intercept slope (m)? (b)? b) Y = -3 x + 2 c) Y =. 33 x

How to make an equation from a graph

Challenge #2 Find the equation of a real life situation

#1 Derek started with no money in his bank account, but he just got a job mowing lawns and he gets $20 a week. He puts all of it in his account. How much money will he have in his account in x weeks? C) What is the equation? a) Y = 20 x A)B) What is the y-intercept slope (m)? (b)? b) Y = -20 x + 0 c) Y = x + 20

#2 Rosa has a bank account with $120 in it and she takes out $5 a week. How much money will she have in her account in x weeks? C) What is the equation? a) Y = 120 x + 5 b) Y = 120 + 5 c) Y = -5 x + 120

#3 Frank has an iphone. The iphone costs $39 a month plus $0. 01 a minute. What is the equation for his monthly bill? C) What is the equation? a) Y = 39 x b) Y = 39 x + 0. 01 c) Y = 0. 01 x + 39

#4 David was raising money for the school in a walkathon. He got $100 pledged no matter what plus $6 for every mile he walked. What is the equation for how much money he will make? C) What is the equation? a) Y = 100 x + 6 b) Y = 6 x + 100 c) Y = 106 x

Challenge Problem What is the slope of a line that passes through (7, 1) and (6, 5)?

Do you feel like you can find an equation from a graph or situation? 1 -3

Now try it on your own!

Linear Equations #1 -14 98 10 11 12 13 14 O 1 minutes 2 3 4 5 6 7 Time: 15 • Solve each problem in any order • Click in your answer • If a number shows up instead of a letter just make sure the number and letter are on the same button and then send • You can skip ahead or change answers to past problems by using the arrow keys • When done: work on challenge sheet (for this you will need to use a pencil)