scalar and dot product

What is a vector?

• A vector is a type of graph.

• A vector is a point in space.

• A vector is a scalar quantity.

• A vector is a quantity defined by both magnitude and direction.

What happens when you multiply a vector by a negative scalar?

• The vector's direction is reversed.

• The vector's magnitude is doubled.

• The vector remains unchanged.

• The vector's components are squared.

What is the difference between a scalar and a vector?

• Scalars have direction; vectors have only magnitude.

• Scalars have magnitude only; vectors have both magnitude and direction.

• Scalars can be represented as arrows; vectors cannot.

• Vectors are always positive numbers; scalars can be negative.

• 63

• < 18 , 45 >

• < 9 , 14 >

• 57

• -4

• -7i + 3j

• 6i - 10j

• 7

• -92

• < -56 , -36 >

• 95

• < 1 , -5 >

• 0

• < -8 , 7 >

• < 0 , 0 >

• -56

•  22

•  18

Vector a = <3, -4>. What is the value of 3a?

• -36

• 6

• <9, -12>

• <-6, 1>

• <7, 9>

• <10, 20>

• 40

• 30