Answer
Fill the blanks with
$y,\quad x$
Work Step by Step
Slope of the line $\quad y=mx+b$
is defined as
$m=\displaystyle \frac{\Delta y}{\Delta x} =\displaystyle \frac{\text{change in y}}{\text{change in x}}$,
that is, the change in y per unit increase in x.
(if we increase x by 1, y will increase by m)
Fill the blanks with
$y,\quad x$
