Question

This scatter plot shows the relationship between the number of sweatshirts sold and the temperature outside. Sweatshirt Sales vs. Temperature 300 250 200 Sweatshirts Sold 150 + 100 50 0 10 50 20 30 40 Temperature (°F) The y-intercept of the estimated line of best fit is at (0, b). Enter the approximate value of the b in the first response box. Enter the approximate slope of the estimated line of best fit in the second response box, y-intercept slope

Answer 1

CCA, this is the solution:

As you can see, we have the following ordered pairs in the line given:

(0, 250) and (30, 150)

Step 1: Let's calculate the slope, this way:

m = 150 - 250/ 30 - 0

m = -100/30

m = -10/3 (This is the slope)

Step 2: Let's find the y-intercept, as follows:

Let's recall that the equation of a line has the form:

y = mx + b, where m is the slope

Replacing by the values we know:

150 = -10/3 * 30 + b

b = 150 + 100

b = 250 (This is the y-intercept)