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March 1 Graphing And Y Intercept

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March 1 Graphing And Y Intercept

1. 1. GRAPHING! 2
2. 2. What would happen if there was a number added to our line? What would y = x + 1 look like?
3. 3. y=x+1 x 1 2 3 0 -1 -2 -3 y
4. 4. What if that number increased? What would y = x + 4 look like?
5. 5. y=x+4 x 1 2 3 0 -1 -2 -3 y
6. 6. What happens to the line when that last number increases? Do you think that is always the case? We should assign it a variable then, b
7. 7. What happens when b is negative!? What would y = x - 2 look like?
8. 8. y=x-2 x 1 2 3 0 -1 -2 -3 y
9. 9. So lines come in the form y = mx + b where m affects the slope of the line and b changes where the line crosses the y axis..... where it intercepts the y axis.... so we call it ..... the y-intercept!