2-Btechnique level
Regression by brackets — drop in the points, read off the coefficients
On a function problem that gives you points, get the coefficients from one pair of brackets instead of solving a system by hand.
In this lecture
- 1
A shape with blanks
the letters you do not know
- 2
Regression
Desmos finds those letters for you
- 3
Count
at least as many points as letters
- 4
The row
x's in one bracket, y's in the other, joined by ~
- 5
Read
the letters and RMSE under the row
Past questions this covers
119faster with Desmos2about the same0better by hand
Do these first
The problem we'll work on, after the idea
f(x) = ax + b passes through (5, 9) and (2, 3). Find a and b.