1
Q
direct proportional
A
z∝ x
z = kx
2
Q
inverse proportion
A
z ∝ 1/x
z = k/x
3
Q
direct proportion graph
A
graph containing z and x will be linear and pass through the origin, and has a gradient equal to k
4
Q
inverse proportion graph
A
doesn’t pass through the origin, and forms a reciprocal curve
5
Q
ratio
A
used to describe a fraction
6
Q
proportion
A
a statement that two ratios are equal
can be direct or inverse
