Answer:
Step-by-step explanation:
hello :
an equation is : y=ax+b
a line intersecting at -3 on x : when x=-3 y=0 means : 0=a(-3)+b ...(*)
a line intersecting at 3 on y axis : when x=0 y=3 means : 3 = a(0)+b....(**)
by (**) : b=3 put this value in (*) : 0 = -3a+3 so a= 1
an equation is : y = x+3
