Question 943670
Using the general point-slope formula:
{{{ ( y - 7 ) / ( x - 2 ) = 4 }}}
{{{ y - 7 = 4*( x - 2 ) }}}
{{{ y  - 7 = 4x - 8 }}}
{{{ y = 4x - 1 }}}
In functional notation:
{{{ f(x) = 4x - 1 }}}
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check:
does it go through (2,7 )?
{{{ f(2) = 7 }}}
{{{ 7 = 4*2 - 1 }}}
{{{ 7 = 7 }}}
OK