00:01
So in this problem, we're given these points in a figure, minus 5 -1, minus 4 -3, minus 2 -5, and minus 3, 6.
00:19
And we're asked to determine a quadratic equation that goes through these points to do a regression on them.
00:31
So with these points, we're asked to do a quadratic regression.
00:35
So if i bring up desmos .com and bring up the graphing calculator, then i could go in here, do the plus here, and do a table, and then i can put in my points, minus five, minus four, minus three, and minus two.
01:07
And minus five has a y value of one, minus four has a y value of one, minus four has a value of 3 minus 3 has a y value of 6 and minus 2 has a y value of 5 now if remember correctly a quadratic function looks like this y equals a x squared plus bx plus c so if i put in this format into my graphing calculator over here it can get it to do the regression so why i do the regression actually i have to say say y1, so it looks at the table.
01:53
And then to do the regression, i give it this little squiggly right here, a little tildy.
01:58
And i say, a, x squared plus x, plus, oh, and these are supposed to be x ones.
02:15
So it looks at the x's in the table.
02:20
And there we go.
02:22
Let's get our points to show up here on our graph...