Notes with answers - Summit Schools

Your Notes
Example 1 Use Slope-Intercept Form to Graph a Line
Graph y 1 3 } x 5 1.
2
solution
1. Solve the equation for y by subtracting 3
} x from each
2
side:
y 5 1 2 3
} x or y 5 2
2 3
} x 1 1
2
2. Find the y-intercept. Comparing y 5 2 3
} x 1 1 to
2
y 5 mx 1 b, you can see that b 5 1 . Plot a point
at ( 0 , 1 ).
3. Find the slope. The slope is m 5 2 3
} , so
2 rise
}
run
From (0, 1), move down 3 units and right
2 units. Plot a second point at ( 2 , 22 ).
4. Draw a line through the two points.
1
O
y
1
x
GraphinG Equations in standard Form
Step 1 Write the equation in standard form .
Step 2 Find the x-intercept by letting y 5 0 and
solving for x . Plot the corresponding point.
Step 3 Find the y-intercept by letting x 5 0 and
solving for y . Plot the corresponding point.
Step 4 Draw a line through the two points .
5 23
}
2 .
34 Lesson 2.4 • Algebra 2 C&S Notetaking Guide Copyright © McDougal Littell/Houghton Mifflin Company