Algebra II
Name ___________________________________

Graphing Calculator Activity
Equations of Lines


Instructions:
1. Put a "friendly window" into the RANGE of your calculator.

Xmin: -9.4 Ymin: -6.2
Xmax: 9.6 Ymax: 6.4
Xscl: 1 Yscl: 1

(I have found that ZOOM:Integer does very nicely)

2. Graph each equation.
3. Use TRACE to find whole numbers for (x1, y1) and (x2, y2).
4. Calculate y2-y1 and x2-x1.
5. Calculate the slope using the equation slope = (y2-y1)/(x2-x1).
6. TRACE to find the Y-intercept.

Equation ....(x1,y1)....(x2,y2) ....y2-y1 ...x2-x1 ..Slope ...Y-Intercept

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1. y = 2x

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2. y = .5x + 3.5

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3. y = -3x - 2

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4. y = (-3/4)x + 4

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5. y = 3x - 2

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6. y = (2/3)x + 1

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7. y = (-1/2)x - 4

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8. 2x + 3y = 6

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Compare the slope that you found with its equation. Where is it
always located? ________________________________________

Now compare the y-intercept and its equation. Where is it always located? ______________________________________________

What about the location of slope and y-intercept in the equation
2x + 3y = 6 ?
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