1. Does y vary directly with x ? If so, what is the constant of variation, and the function rule? 2. y varies directly with x, and y = 24 when x = -15,

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1. Does y vary directly with x ? If so, what is the constant of variation, and the function rule? 2. y varies directly with x, and y = 24 when x = -15, what is x when y = 16

Wed 9/23 Lesson Learning Objective: To write eq’ns of lines in slope-intercept form Hw: Pg. 78 # 13 – 27 odd, 47 – 49, CC *7, *46, *58

Algebra II

 To write equations of lines in slope-intercept form

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 Slope-intercept form – an equation of a line y = mx + b y-intercept slope y-intercept – point where line crosses y-axis x-intercept – point where line crosses x-axis

To rewrite a linear equation into slope- intercept form Get the equation into y=+ by solving for y.

They are perpendicular because the slopes 1 and -1 are opposite reciprocals!

y= x models the amount of money in your wallet. y = total in dollars x = # of weeks from today 1. Is it in slope intercept form? 2. What is the slope? 3. What does the slope represent?