Question 964175
In symbols, {{{y=kx}}}.


Accordingly two points (x,y) are (5,45) and (14,153).
Use the less complicated point.
{{{y=kx}}}
{{{k=y/x}}}
{{{k=45/5}}}
{{{k=9}}}


Will the factor k produce the second given point?
{{{y=9*14}}}
{{{y=126}}}
Problem is {{{y=126<>153}}}.


The given description, y varies directly with x, DOES NOT WORK.
The two given points may have a linear fit if this is needed, but the fit must have a y-intercept other than zero.