The family of lines Student activity Play

The family of lines Whiteboard exercise Play

The family of lines y = 2x + c Animation Play

The figure and its symmetry Whiteboard exercise Play

The formula and the graph Student activity Play

The formula for linear regression Animation Play

The formula for linear regression Student activity Play

The formula for the best-fit line Student activity Play

The function  y = 2x Animation Play

The function  y = 2x + 1 Animation Play

The function  y = –2x Animation Play

The general form of the equation of a straight line Whiteboard exercise Play

The general form of the equation of a straight line Student activity Play

The gradient and the y-intercept of a straight line Whiteboard exercise Play

The gradient and the equation of a tangent Student activity Play

The gradient of a line Whiteboard exercise Play

The gradient of a line Student activity Play

The gradient of a line perpendicular to the  x-axis Animation Play

The gradient of a straight line Whiteboard exercise Play

The gradient of a straight line Student activity Play

The gradient of the road Whiteboard exercise Play

The graphical solution of an inequality Animation Play

The graphs that are constant functions Whiteboard exercise Play

The information from the graph Animation Play

The intercept form of a straight line Animation Play