Page 156 - Mathematics GRADE 9, DE-STREAMED (MTH1W)
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XY −10 10 43
y = 1 −(1 / 2)x + 5 8 ?
5. Have students use and compare various strategies to determine the equation of a line when given two points on the line. For example, have them determine the equation of the line connecting the points (−6, −10) and (4, 8) by:
• plotting the points and determining the slope and y-intercept from the graph, or
• calculating the slope and substituting it and a point into y = ax + b to determine the value of b.
Ask students how these methods compare in terms of difficulty and accuracy.
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