Question 691509

slope {{{m= 2/5}}}, the point ({{{x}}},{{{y}}})=({{{10}}},{{{3}}}) is on the line

Find: 

the {{{y-intercept}}} 


{{{y = mx + b}}} .....plug in {{{m= 2/5}}}, {{{x=10}}}, and {{{y=3}}}

{{{3 = ( 2/5)10 + b}}}....solve for {{{b}}}

{{{3 =  20/5 + b}}}

{{{3 =  4 + b}}}

{{{3-4 = b}}}

{{{highlight(-1 = b)}}}.......the {{{y-intercept}}} is at ({{{0}}},{{{-1}}})


{{{ graph( 500, 500, -6, 5, -10, 10, ( 2/5)x-1 ) }}}