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Delete - Last Modified By: TST at 21/11/2013 11:18:26 AM
Use this link to learn how to use the gradient-intercept method:
This can be used if the line is written in standard form: y = mx + c, where m is the gradient and c is the y-intercept.
Step 1: Plot at point at the y-intercept
Step 2: Write the gradient in the form m = rise/run
Step 3: Starting from the y-intercept, move up the number of units suggested by the rise (or move down if the number is negative)
Step 4: Move the right the number of units suggested by the run and plot the second point.
Step 5: Draw a straight line through these two points (using a ruler!)
Edit Delete - Last Modified By: TST at 21/11/2013 11:31:03 AM
Sketch the following graphs on graph paper:
a) y = x - 7
b) y = 2x + 1
c) y = -2x + 2
d) y = 1/2 x - 1
e) y = 4 - x
f) y = - 2/3 x + 8
Edit Delete - Last Modified By: TST at 21/11/2013 11:34:07 AM
Watch the following link about how to use the X-intercept and Y-intercept method:
Step 1: Find the y-intercept by substituting x = 0 into the rule and solving for y
Step 2: Find the x-intercept by substituting y = 0 into the rule and solving for x
Step 3: Plot the x- and y-intercepts and draw a straight line through them (using a ruler!)
Edit Delete - Last Modified By: TST at 21/11/2013 11:36:50 AM
Graph the following using the X-intercept and Y-intercept method:
g) 5y - 4x = 20
h) 0.2y = x + 2
i) 3y + 4x = -12
j) 2y = 5x - 2
k) 2y + 3x + 5 = 0
Edit Delete - Last Modified By: dsi at 9/12/2013 12:25:56 PM