Question 115e89a

$x$	$10$	$15$	$20$	$25$
$f (x)$	$82$	$137$	$192$	$247$

The table shows four values of $x$ and their corresponding values of $f (x)$ . There is a linear relationship between $x$ and $f (x)$ that is defined by the equation $f (x) = m x - 28$ , where $m$ is a constant. What is the value of $m$ ?

Algebra - Linear functions