An art teacher needs to buy 20 shirts for a class project. She can buy the shirts at a local store or online.
This graph shows the costs, in dollars, for different
numbers of shirts at a local store.
T
Costs of Shirts
at a Local Store
Total Cost ($)
60
55
50
45
40
35
30
25
20
15
.
10
5
10 12

a framing bias

step-by-step explanation:

rodrigo is subject to a framing bias i believe.

boxplot

a is the right answer

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116