1. Data Analysis Interpret Slope and y- Intercept
Goal: I will interpret the slope and the intercept of a linear model in the context of the data. (S-ID.7)

2. interpret the slope and the intercept

3. interpret the slope and the intercept

4. interpret the slope and the intercept

5. example
It costs $35 per hour plus a flat fee of $20 for a plumber to make a house call.
What is an equation of the form y = mx + b for this situation?
What is the slope?
What is the meaning of the rate of change in context of this problem?
Does the y-intercept have any real meaning?
If so, state the meaning.
y =35𝑥+20 35
$35 per hour 20
A plumber will charges $20 to come out to your house without doing any repairs.

6. example
An electrician charges a fee of $60 plus $45 per hour. Let y be the cost in dollars of using the electrician for x hours.  
Find the slope-intercept form of the equation.  
What is the slope?  
What is the meaning of the rate of change in context of this problem?
Does the y-intercept have any real meaning?
If so, state the meaning.
y =45𝑥+60 45
$45 per hour 60
A electrician will charges $60 to come out to your house without doing any repairs.