L7Teacher'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?