Answer:
The price of one gram of gold decreased by $1.25 from the beginning of week 1 to week 4.
Step-by-step explanation:
From the given chart;
The change in price between week 0 and week 1;
ΔP₁ = P₁ - P₀
1.5 = P₁ + 0
P₁ = 1.5
The change in price between week 1 and week 2;
ΔP₂ = P₂ - P₁
-3.375 = P₂ - 1.5
P₂ = -3.375 + 1.5
P₂ = -1.875
The change in price between week 2 and week 3;
ΔP₃ = P₃ - P₂
0.625 = P₃ - (-1.875)
0.625 = P₃ + 1.875
P₃ = 0.625 - 1.875
P₃ = -1.25
The change in price between week 3 and week 4;
ΔP₄ = P₄ - P₃
1.5 = P₄ - (-1.25)
1.5 = P₄ + 1.25
P₄ = 1.5 - 1.25
P₄ = 0.25
The change in price of one gold from the beginning of week 1 to end of week 4;
ΔP = P₄ - P₁
ΔP = 0.25 - 1.5
ΔP = -1.25
Thus, the price of one gram of gold decreased by $1.25 from the beginning of week 1 to week 4.
