Question 191439
m=(y2-y1) / (x2-x1) =   (18-(-12))  /  (13-10)  =  30/3 = 10

y=mx +b = 10 *x +b

subst  (  13 ,  18)

( 18) = 10 * (13)    +b = 130 +b

b = (-112)

y = m*x  +b

y = 10*x  -  112

check   -12 = 10 * 10 -112  =  -12    ok

check    18 = 10 * 13  -112  =  18   ok