Answer:
the 3rd one
Step-by-step explanation:
i graphed it mentally and found out the slope was 2 and the y intercept is 1
18/30 = $0.6 per message
0.6 * 12 = 7.2
Solution: $7.20 for 12 messages
So, the equation to solve then is: 0.3 x=100
Solving for x, we get x=100 /0.3
or x, we get x=333.333333
This means, 100 is 30 % of 333.333333