Respuesta :

emnotokay
you can use point-slope form

y-y1=m(x-x1)+b

y-12=0.5(x-(-9))+3

y-12=0.5(x+9)+3

y=0.5x+4.5+3+12

y=0.5x+19.5
summerfaire7

My answer was: y=0.5x+16.5