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# Functions Progress June 1

• Date

• Question written down

• Working vertically set out (line down centre)

• Coordinates labelled with (x,y), not just either x or y

• Graph constructed neatly

• Working shown sequentially

• Found and labelled 2 points to graph linear function (convention is to use intercepts)

• Used discriminant to establish if it is necessary to find x intercepts of quadratic function

• Found value of vertex of quadratic function

• Found value of x-intercepts of quadratic function

• Found y intercept of quadratic function

• Equated the 2 functions to each other

• Rearranged the 2 functions to solve (realising that solving this is different to finding x intercepts. This step is finding intersection points of the 2 functions)

• Uses factorising methods to solve. Finds 2 values of x.

• Substitutes x values into original equation to find corresponding y coordinates.

• Checks solutions against graph created to ensure reasonableness.

• Shows clearly in graph or sentence the coordinates of the intersection points

• Reflects and writes comment about the parts of the process that are difficult

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