Charlie wants to draw a straight line graph that passes through (0,4) and (1,6):
"I can start my graph on the y axis at y=4. Then I need to go along 1 and up 2 to get to (1,6). I can carry on going along 1 and up 2 to get to the other points on the line, so the y coordinate is always $4 + 2 \times$ the $x$ coordinate, $y = 4 + 2x$."
Can you find similar expressions to describe the following lines?
*some pairs of points go here*
Alison wants to draw a straight line graph that passes through (0,4) and (5,0).