Question

practice:

1. interpret the slope:
2. interpret the y-intercept:

hours after 7 am
battery life percentage
rect line of best fit.

Explanation:

Step1: Identify two points on the line

The line passes through (0, 100) and (10, 20).

Step2: Calculate the slope

Slope formula: $m = \frac{y_2 - y_1}{x_2 - x_1}$
Substitute values: $m = \frac{20 - 100}{10 - 0} = \frac{-80}{10} = -8$
Interpretation: For each additional hour after 7 AM, the battery life percentage decreases by 8%.

Step3: Identify the y - intercept

The y - intercept is the value of y when x = 0. From the point (0, 100), the y - intercept is 100.
Interpretation: At 7 AM (0 hours after 7 AM), the battery life percentage is 100%.

Answer:

1. The slope is -8, meaning battery life decreases by 8% per hour after 7 AM.
2. The y - intercept is 100, meaning at 7 AM, battery life is 100%.