Accelerated 8 February 18

Accelerated 8

February 18, 2021

Line of Best Fit

• A line of best fit  (or "trend" line) is a straight line that best represents the data on a scatter plot. 

• This line may pass through some of the points, none of the points, or all of the points.

• We can place the line "by eye": try to have the line as close as possible to all points, and a similar number of points above and below the line.

Multiple Choice

Quiz 17 Review Question: Go look up what you answered, keep it the same if it was correct.


Which expression is equivalent to  $\left(\frac{3r}{s}\right)^3\times\frac{s^2}{9}$  

•  $r^3s$  

•  $\frac{r^3}{s}$  

•  $\frac{3r^3}{s}$  

•  $3r^3s$  

Multiple Choice

Quiz 17 Review Question: Go look up what you answered, keep it the same if it was correct.

In which table is y a linear function of x?

Multiple Choice

Quiz 17 Review Question: Go look up what you answered, keep it the same if it was correct.

The value of a car over a period of time is shown in the table below. Which statement is true of the value of the car?

• The initial value of the car is $15,000, and it decreases by $750 every year.

• The initial value of the car is $16,500, and it decreases by $750 every year.

• The initial value of the car is $16,500, and it increases by $750 every year.

• The value of the car is $15,000, and it increases by $750 every year.

Fill in the Blanks

Simplify. Your answer should only contain positive exponents. Use ^ for exponents. Write your answers in alphabetical order.

 $\frac{2x^4y^{-2}\times x^2y^{-2}}{\left(2x^{-2}y^0\right)^3}$  

Multiple Choice

Which of the following equations is represented by the graph?

• $6x-y=-3$

• $x-6y=3$

• $x-3y=6$

• $3x-y=-6$

Fill in the Blanks

A farmhouse shelters 17 animals. Some are buffalo and some are chickens. Altogether there are 52 legs. How many of each animal are there?

(chicken, buffalo)

Multiple Choice

Carla's Catering uses the equation    $y=6.75x+25$  to calculate the cost for delivering x boxed lunches to an event. The table shows the total cost Dan's Diner charges to deliver different numbers of boxed lunches to an event. If a customer wants to place an order for 12 lunches, which company will provide the lowest total cost and by how much?

• Carla's catering is lower by $11.00

• Dan's Diner is lower by $11.00
  

• Carla's catering is lower by $21.00

• Dan's Diner is lower by $21.00

Multiple Choice

In which function table do all the points (x,y) lie on the line that has a slope of 3 and y-intercept of 2?