Can someone please help me. I am supposed to use regression to find a quadratic function that can be used to predict the number of new incorporations x years after 1980. Below is the x (left side) and y(right side) values to use in my calculator. For the x values, I was instructed to use 0, for 1980, 2 for 1982 and so on. Nothing was instructed for the Y values other than entering them as they are. I select the quad reg on my calculator, but I keep getting the wrong answer. Am I putting it in wrong, or am I missing something
1980,521
1982,561
1984,641
1986,701
1988,696
1990,646
1991,616

Question

Can someone please help me. I am supposed to use regression to find a quadratic function that can be used to predict the number of new incorporations x years after 1980. Below is the x (left side) and y(right side) values to use in my calculator. For the x values, I was instructed to use 0, for 1980, 2 for 1982 and so on. Nothing was instructed for the Y values other than entering them as they are. I select the quad reg on my calculator, but I keep getting the wrong answer. Am I putting it in wrong, or am I missing something
1980,521
1982,561
1984,641
1986,701
1988,696
1990,646
1991,616

directrix · Answer

@nolegirl I used the online quadratic regression calculator with the points as given. Take a look at what the online tool cranked out as the equation. I am not saying that this is correct. See what you think, okay? http://www.xuru.org/rt/PR.asp

anonymous · Answer

Thanks!