h(x)= -kx + 14
18 = -k*2 + 14 since x=2
18 = -2k +14
subtract 14 from each side
4 = -2k
divide by -2
-2 =k
k = - 2
evaluate h(2), equate to 18 and solve for k
h(2) = - 2k + 14 = 18 ( subtract 14 from both sides )
- 2k = 4 ( divide both sides by - 2 )
k = - 2
