Patterns 2

Find the rule for slabs needed

It is not linear so must be quadratic

X 1 2 3 4 5 6 7 8Y 3 8 15

Ist 5 7 9 11 13 15 172nd 2 2 2 2 2 2

X 1 2 3 4 5 6 7 8Y 3 8 15

Ist 3 5 7 9 11 13 15 172nd 2 2 2 2 2 2

X 1 2 3 4 5 6 7 8Y 3 8 15

Ist 3 5 7 9 11 13 15 172nd 2 2 2 2 2 2

X 1 2 3 4 5 6 7 8Y 3 8 15

Ist 3 5 7 9 11 13 15 172nd 2 2 2 2 2 2

Check formula when x = 3 and it works

• If you wanted to build a structure with 25 storeys, how many slabs of wood would be needed?

• If you wanted to build a structure with 25 storeys, how many slabs of wood would be needed?

Using