I don't really understand and I need help.

see explanation

Step-by-step explanation:

Expressing the rule in the form y = mx + b

where m is the slope and b the y- intercept

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (2, 1) and (x₂, y₂ ) = (4, 0) ← 2 ordered pairs from the table

m = = = - , thus

y = - x + b ← is the partial equation

To find b substitute any ordered pair into the partial fraction

Using (4, 0), then

0 = - 2 + b ⇒ b = 0 + 2 = 2

y = - x + 2 ← function rule

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here