Question 317946
Thru (2,3) and perpendicular to 
y=-5x+12 (red line) this line has a slope (m)=-5.
The perpendicular line will have a slope=1/5.
Y =mX+b
3=1/5*2+b
3=2/5+b
b=3-2/5
b=15/5-2/5
b-13/5 ans. for the Y 9intercept.
Y=x/5-13/5 (green line
 {{{ graph( 300, 300, -10, 10, -10, 10, -5x +12, x/5 -13/5) }}} (graph 300x300 pixels, x from -10 to 10, y from -10 to 10, of TWO functions -5x 12 and x/5 -13/5).