Review question

 $x\vphantom{4}$ $\smash{y}\vphantom{4}$ $4$ $7$ $10$ $13$ $96$ $133$ $160$ $117$
In the above table the values of $y$ were calculated from a formula $y = Ax^2 + Bx$, where $A$ and $B$ are constants. One of the values of $y$, however, has been deliberately misprinted.
Plot the values of $y/x$ against those of $x$, and
1. find which value of $y$ has been misprinted and give the correct value,
2. estimate the numerical values of $A$ and $B$.