Question

Which function passes through the points (2,3) and (4,4)?

Answer 1

A(2;3), B(4;4)
$y=ax+b$
$a=\dfrac{4-3}{4-2}=\dfrac{1}{2}$
$3=\dfrac{1}{2}*2+b$
$3=1+b$
$b=2$

$y=\dfrac{1}{2}x+2$

:)