Question

Is this correct?
Determine the equation of a line, in standard for, that will get your spacecraft from the Launch area to point A.
Launch area: (1,2)
Point A: (2,5)
m=y2-41/x2-x1=5-1/2-1=3/3=1
y-2=1(x-1)
y-2=x-1
x+y=1-2
x+y= -1
if not what did i do wrong?