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# Alg1 lesson 5.3 and 5.1

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### Alg1 lesson 5.3 and 5.1

1. 1. Graph<br />21<br />Slope:<br />y-intercept:<br />Slope-intercept form<br />y = mx + b<br />-4<br />Example 3-3b<br />
2. 2. 32<br />Graph y = x – 4 <br />32<br />Slope:<br />y-intercept:<br />-4<br />Example 3-3b<br />
3. 3. 43<br />Graph y = - x + 2 <br />43<br />-<br />Slope:<br />y-intercept:<br />2<br />Example 3-3b<br />
4. 4. Graph<br />54<br />-<br />Slope:<br />y-intercept:<br />2<br />Example 3-4a<br />
5. 5. Graph 2x – 5y = 10<br />-2x<br />-2x<br /> – 5y = -2x + 10<br />-5<br />-5<br />25<br />y = 2 x – 2 5<br />Slope:<br />y-intercept:<br />-2<br />Example 3-4a<br />
6. 6. Slope-intercept form<br />Write an equation of the line shown in the graph. <br />42<br />= 2<br />Slope:<br />y-intercept:<br />-3<br />Example 3-2a<br />
7. 7. Answer: <br />Write an equation of the line shown in the graph. <br />24<br />12<br />-<br />-<br />=<br />Slope:<br />y-intercept:<br />3<br />Example 3-2c<br />
8. 8. Write an equation of the line whose slope is and whose y-intercept is –6. <br />Slope-intercept form<br />Example 3-1a<br />
9. 9. Graph<br />Table<br />Slope:<br />-3 2<br />y-intercept:<br />4<br />-3 2<br />y = x + 4<br />Equation:<br />-3 2<br />f(x) = x + 4<br />
10. 10. Find the slope of the line that passes through (–3, 2) and(5, 5). <br />Slope <br />3<br />8<br />Example 1-1a<br />
11. 11. Find the slope of the line that passes through (–3, –4)and(–2, –8). <br />Slope <br />-4<br />1<br />Example 1-1a<br />
12. 12. Find the slope of the line that passes through (–3, 4)and(4, 4). <br />Slope <br />0<br />7<br />A horizontal line has a slope of zero.<br />Example 1-1a<br />
13. 13. Find the slope of the line that passes through (2, 4)and(2, 7). <br />30<br />Slope = <br />undefined<br />3<br />0<br />A vertical line has an undefined slope.<br />7 – 4 2 – 2 <br />30<br />=<br />undefined<br />Example 1-1a<br />