Multiply 3 times 1.05= 3.15, that is who much he got in 3 weeks.now add 3.15 and 7.50 witch is 10.65
They are different equations lol. If you plug in the same x and y for both you wont get the same answer. Do you have answer choices?
The correct answer to this problem would be -3. Based on the points you've provided on the graph, -3 would be the correct common difference. :)
I think B should be the answer
