The table shows the ratio between the number of packets and the number of seeds of a certain plant contained in them: Number of packets Number of seeds
5 15
6 18
7 21
Which graph shows equivalent ratios? (1 point)

a
A graph is drawn. The horizontal axis and vertical axis values are 0 to 30 in increments of 3. The horizontal axis label is Number of Packets, and the vertical axis label is Number of Seeds. Points are plotted on the ordered pairs 3, 9 and 6, 18 and 9, 27.

b
A graph is drawn. The horizontal axis and vertical axis values are 0 to 30 in increments of 3. The horizontal axis label is Number of Packets, and the vertical axis label is Number of Seeds. Points are plotted on the ordered pairs 3, 3 and 6, 3 and 9, 3.

c
A graph is drawn. The horizontal axis and vertical axis values are 0 to 30 in increments of 3. The horizontal axis label is Number of Packets, and the vertical axis label is Number of Seeds. Points are plotted on the ordered pairs 3, 9 and 3, 6 and 9, 9.

d
A graph is drawn. The horizontal axis and vertical axis values are 0 to 30 in increments of 3. The horizontal axis label is Number of Packets, and the vertical axis label is Number of Seeds. Points are plotted on the ordered pairs 9, 3 and 18, 6 and 27, 9.