+ Warm Up 1) Find d when a 1 = 2 and a 13 = 11.6 2) Find the first term of a sequence where d = -7 and the 5 th term is -19.

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Presentation transcript:

+ Warm Up 1) Find d when a 1 = 2 and a 13 = ) Find the first term of a sequence where d = -7 and the 5 th term is -19.

+ HW Check – 2.1

+ Unit 4 Linear Functions Slope and introduction to slope-intercept

+ Warm-Up 1) -2(x – 4) = 16 2) 2x – 3 = 7x – 18 3) 5x + 10 = 5(x + 2)

+ Slope Intercept Form

+ Slope is a rate of change or the steepness of a line Y-intercept is where it crosses the y-axis or a “start value”

+

+ Find Slope and Y-intercept

+ Solving for Y To put in Slope-Intercept Form, solve for y. Ex: 2x + y = 7

+ Solving for Y 2x + 2y = 8

+ Solving for Y 5x - y = -4

+ Graph!

+

+

+

Standard Form: Where A, B, and C are coefficients, and x and y are our variables. (C/B) is our y-intercept (C/A) is our x-intercept x-intercept y-intercept

+ Word Problems 1. Lin is tracking the progress of her plant’s growth. Today the plant is 5 cm high. The plant grows 1.5 cm per day. How many days has the plant been growing?

+ Word Problems 2. Mr. Thompson is on a diet. He currently weighs 260 pounds. He loses 4 pounds per month. He currently weighs 140 pounds. How many months has he been dieting?

+ Word problems 3. The freshman class holds a car wash to raise money they need a total of 1600 dollars. A local merchant donates all the supplies. A wash costs $5 per car and $6.50 per van or truck. Write an equation to model this situation. If they wash 36 cars, how many vans/trucks do they need to wash to meet their goal.

+ Classwork – Pages 2 & 3 Homework – Page 4