Question

The Scatter plot below shows the linear trend of the number of golf carts a company sold the month of February and a line of best fit representing this trend. A. Write a function that models the number of golf carts sold as a function of the number of days in the month of February B. What is the meaning of the slope as a rate of change for this line of best fit.

Answer 1

Answer:

A). f(x) = (-5)x + 90

Step-by-step explanation:

A). As shown in the graph, line of best fit is passing through two points (0, 90) and (18, 0).

Equation of this line will be in the form of y = mx + b.

Here m = slope of the line

b = y-intercept

Since slope of a line passing through two points (x, y) and (x', y') is represented by,

m = $\frac{y-y'}{x-x'}$

So slope of the line of best fit from the given graph,

'm' = $\frac{90-0}{0-18}$

m = (-5)

y-intercept 'b' = 90

When we plug in these values in the equation,

y = (-5)x + 90

Function representing this situation,

f(x) = -5x + 90

B). Slope of the line of best fit shows the change in sales per day in the month of Feb that is "5 golf carts per day".

Negative notation of the slope shows the decrease in the sales day by day.

Answer 2

Answer:a. Write a function that models the number of golf carts repaired as a function of the number of days in the month of February:

y=(1/3)x

b. What is the meaning of the slope as a rate of change for this line of best fit?

For each three days of the month of february the number of golf carts repaired was 1; that means each three days of the month of february was repaired one golf cart.

Step-by-step explanation:

a. Write a function that models the number of golf carts repaired as a function of the number of days in the month of February:

y=(1/3)x

b. What is the meaning of the slope as a rate of change for this line of best fit?

For each three days of the month of february the number of golf carts repaired was 1; that means each three days of the month of february was repaired one golf cart.

Let:

x: Day of the month

y: Number of golf carts repaired

a. Write a function that models the number of golf carts repaired as a function of the number of days in the month of February.

Taking two points of the right line, for example:

P1=(0,0)=(x1,y1)→x1=0, y1=0

P2=(3,1)=(x2,y2)→x2=3, y2=1

Slope: m=(y2-y1)/(x2-x1)

Replacing the known values:

m=(1-0)/(3-0)

m=1/3

Equation of the right line, using the form point-slope:

y-y1=m(x-x1)

Replacing the known values:

y-0=(1/3)(x-0)

y=(1/3)x