Question

Find the rule and solve for n.

Answer 1

• (10,1)
• (12,3)

Rule denotes to equation

$\\ \rm\rightarrowtail m=\dfrac{3-1}{12-10}=\dfrac{2}{2}=1$

Equation in point slope form

$\\ \rm\rightarrowtail y-1=x-10$

$\\ \rm\rightarrowtail y=x-9$

So

$\\ \rm\rightarrowtail n=20-9=11$