Question 1109518
Linear equations are of the form
{{{y=m*x+b}}} , where {{{m}}} is usually called slope,
but it could also be called rate of change.
For example, if a small child gets a piggy bank with 5 coins inside,
and each night adds the {{{2}}} coins mom gives him as allowance because he was a good boy,
after {{{x}}} days, the number of coins in the piggy bank, {{{C}}} ,
will be
{{{highlight(C=2x+5)}}} , with a rate of change (or slope) of {{{"2 coins / day"}}} .
{{{4.5/2=2.25}}} , and {{{2/5=0.4}}} ,
so a rate of {{{2}}} is between the two numbers specified.