1- The direction vector for the following line :
= −9 + 4, = 3 − 5, = 11 + 14,
is , Choose an optional answer a nor b nor c nor d ? :

a. ⃗ = −4⃗ + 5⃗ − 14⃗ .

b. ⃗ = −9⃗ + 3⃗ + 11⃗

c. ⃗ = 4⃗ − 5⃗ + 14⃗ .

d. ⃗ = 9⃗ − 3⃗ − 11⃗ .


2- The equation of the plane through the point (7,7,2) with normal vector ⃗ = −7⃗ − 7⃗ + 6⃗, is

I want to solve ? :

( ? ) x + ( ? ) y + ( ? ) z + ( ? ) = 0