The amount of money Sally earns, P, varies directly with the number, n, of necklaces she sells. When Sally sells 15 necklaces, she earns $150. Write the equation that relates P and n. How much money would she earn if she sold 4 necklaces?

Equation:

when n = 4

Step-by-step explanation:

Given

Direct Variation: P ∝ n

When n = 15, P = 150

Required

Determine the equation

Her earnings if she sold 4 necklaces

P ∝ n

Convert variation to equation

When P = 150, n = 15 (Substitute these values in the given equation)

Divide both sides by 15

Substitute k = 10 in

------- Equation that relates P and n

When she sold 4 necklaces, n = 4

Substitute n = 4 in the formula above

this shows a reflection over the x-axis and is translated one unit down and 6 units to the right (x + 6, y - 1)

hope this !

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step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse