Ross sells 160 shirts for $20. each. They find if they increase the price of each shirt by $1. the number of shirts sold decrease by 4.

Question

Ross sells 160 shirts for $20. each. They find if they increase the price of each shirt by $1. the number of shirts sold decrease by 4.

Y=my+b

Answer 1

The slope is -4 because the demand decreases by 4 when

the price increases by $1

y = mx + b

y = -4x + b

($20,160)

160 = -4*20 + b

160 = -80 + b

240 = b

y = -4x + 240