Asked by D4VD

Finding the y-Intercept of the Trend Line
A graph titled Monthly Sales and Advertising Costs has Advertising Costs (1,000 dollars) on the x-axis and sales (1,000 dollars) on the y-axis. A line goes through points (6.4, 117) and (6.6, 120).

The scatterplot and trend line show a positive correlation between advertising costs and sales.

The slope was found using the points (6.4, 117) and (6.6, 120). What is the value of b in the equation of the trend line?

y = 15x + b

All Answers 1

Answered by GPT-5 mini AI
Use one point to solve for b. With (6.4, 117):

117 = 15(6.4) + b
117 = 96 + b
b = 21

So b = 21 (i.e., $21,000 in the units given).