Question 418098
if the points are (x1, y1), (x2, y2), the formula is:
{{{(y - y1)/(x - x1) = (y2 - y1)/(x2 - x1)}}}
given:
(3,5) and (5,9)
{{{(y - 5)/(x - 3) = (9 - 5)/(5 - 3)}}}
{{{(y - 5)/(x - 3) = 2}}}
{{{ y - 5 = 2*(x - 3) }}}
{{{ y - 5 = 2x - 6 }}}
{{{ y = 2x - 1 }}} answer
check answer:
{{{ y = 2x - 1 }}} for (5,9)
{{{9 = 2*5 - 1 }}}
{{{9 = 9}}}
OK
check the other point