Question

Enter the t-shirt price and sales data Sera collected into the regression calculator and generate a regression line.

A 2-column table with 5 rows. Column 1 is labeled Price (dollars): x with entries 10, 12, 14, 15, 17. Column 2 is labeled Number Sold: y with entries 25, 22, 17, 12, 8.

The regression line shows a
.
The relationship between the price of a t-shirt and the number of t-shirts sold is
.

Answer 1

Regression line (least-squares fit, rounded):
y ≈ 51.45 − 2.55x

Interpretation:
- The regression line shows a negative (downward) slope.
- The relationship between the price of a t-shirt and the number of t-shirts sold is negative: as price increases, the number sold decreases (about 2.55 fewer shirts per $1 increase).