y = 2x
y2 = x
y=x+2
2y = x
y=2
y=x–2
xy = 2
y = ± x
x+y=2
2
y =
x
x
y =
2
y = –x + 2
x = ± y
A7 – 6
Interpreting functions, graphs and tables
y = x2
A7
A7 Card set B – Formulae
x added to y is
equal to 2
y is 2 more
than x
x multiplied by y
is equal to 2
y is 2 less
than x
y is double the
size of x
y is always
equal to 2
x is the same as
y multiplied by y
y is the same as
2 divided by x
y is the same as x
multiplied by x
x is the square
root of y
y is the same as
x divided by 2
A7 – 7
Interpreting functions, graphs and tables
y is one half the
size of x
A7
A7 Card set C – Words
y
y
6
6
4
4
2
2
x
2
4
x
6
–6 –4 –2 0
–2
–4
–4
–6
–6
y
y
6
6
4
4
2
2
4
6
0 2
4
6
0 2
4
6
2
4
6
A7
–6 –4 –2 0
–2
2
x
–6 –4
–2 0
2
4
6
x
–6 –4 –2
–2
–2
–4
–4
–6
–6
y
y
6
6
4
4
2
2
x
x
–6 –4 –2 0
–2
2
4
–6 –4 –2
6
–2
–4
–4
–6
–6
y
y
6
6
4
4
2
2
x
–6 –4 –2 0
–2
2
4
6
x
–6 –4 –2 0
–2
–4
–4
–6
–6
y
6
4
2
x
–6 –4 –2 0
–2
2
4
6
–4
–6
A7 – 8
Interpreting functions, graphs and tables
A7 Card set D – Graphs
–2
–1
0
1
2
3
x
–2 –1
0
1
2
3
y
–4
–3
–2
–1
0
1
y
4
3
2
1
0
–1
3
x
–2
–1
0
1
2
3
1.5
y
–4
–2
0
2
4
6
x –2
–1
0
y –1 –0.5
1
2
0 0.5 1
x
0
1
4
9
16
x
–2
–1
0
1
2
3
y
0
±1
±2
±3
±4
y
0
1
2
3
4
5
0
x
–2
–1
0
1
2
3
x
–2
–1
1
2
4
y
4
1
0
1
4
9
y
–1
–2 ± ∞ 2
1
0.5
x
–2
–1
0
1
2
3
y
2
2
2
2
2
2
A7 – 9
Interpreting functions, graphs and tables
x
A7
A7 Card set E – Tables
If you double x,
y halves.
If you add 1 to x,
2 is added to y.
If you add 1 to x,
1 is added to y.
If you add 1 to x,
one half is added
to y.
If you double x,
y doesn’t change.
If you double x,
y is multiplied
by 4.
If you multiply x
by 4, y is
multiplied by 2.
A7
If you double x,
y doubles.
Interpreting functions, graphs and tables
A7 Card set F – Variations
A7 – 10