L7 Teacher's Notes Topic: Alg - y=mx+c Draw a different straight line... and another, and another... Find an unusual one (eg it crosses the y-axis at 3.7,

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L7 Teacher's Notes Topic: Alg - y=mx+c Draw a different straight line... and another, and another... Find an unusual one (eg it crosses the y-axis at 3.7, or it has a gradient of 1 but on this diagram it doesn't cross either axis). What other lines pass through (0,20) ? Straight lines (a) On the graph, draw a different straight line with gradient 1 The graph shows a straight line with gradient 1 (b) The equation of another straight line is y = 5x + 20 The straight line y = 5x + 20 passes through ( 0, ____ ) (c) A straight line is parallel to the line with equation y = 5x + 20 It passes through the point ( 0, 10 ) What is the equation of this straight line? What other questions can you ask/answer?

Straight lines The graph shows a straight line with gradient 1 (a) On the graph, draw a different straight line with gradient 1

(b) The equation of another straight line is y = 5x + 20 The straight line y = 5x + 20 passes through ( 0, ____ )

(c) A straight line is parallel to the line with equation y = 5x + 20 It passes through the point ( 0, 10 ) What is the equation of this straight line?