Question

Find the equation that represents the proportional relationship in this graph,

for y in terms of a.
30
27
24
21
18
15
12
O
3
3 6 9 12 15 18 21 24 27 30

Answer 1

`y=(3)/(4)x`

Explanation:

The graph represents direct variation since it is a line passing through the origin.

The constant of proportionality is
`(18)/(24)=(3)/(4)`, so
`y=(3)/(4)x`.