Quiz about March 21 - March 25 Raider Prep Algebra 1

Question 1

Solve the formula for $$p$$ .

Accepted Answer

$$p=2w\ +\ 36$$

Answer

$$p=9-2w$$

Answer

$$p=-9+2w$$

Answer

$$p=15+2w$$

Question 2

For what value of $$x$$ will the slope between the following points be undefined?

$$\left(x,8\right)$$ and $$\left(3,6\right)$$

Accepted Answer

3

Answer

8

Answer

6

Answer

0

Question 3

The elements of a function of $$x$$ are $$\left(4,1\right),\left(-2,0\right)$$ and $$\left(8,-1\right)$$ . What is the range of the function?

Accepted Answer

$$\left\{-1,0,1\right\}$$

Answer

$$\left\{-1,1\right\}$$

Answer

$$\left\{-4,-2,8\right\}$$

Answer

$$\left\{-4,-2,-1,0,1,8\right\}$$

Question 4

The function of $$f\left(x\right)=1,200-50x$$ gives the distance left to travel after driving $$x$$ hours. What is $$f\left(9\right)$$ , the distance left to travel after driving 9 hours?

Accepted Answer

750 miles

Answer

450 miles

Answer

691 miles

Answer

850 miles

Question 5

Directions: Select all correct answers. You must select all the receive full credit.

Identify each function that has an x-intercept of 3.

Accepted Answer

$$h\left(x\right)=\frac{5}{3}x-5$$

Accepted Answer

$$k\left(x\right)=3x^2-11x+6$$

Answer

$$f\left(x\right)=\frac{-4x+15}{5}$$

Answer

$$g\left(x\right)=3-\frac{1}{2}x^2$$

Answer

$$j\left(x\right)=\left(x+3\right)\left(x-5\right)$$

Question 6

Which situation could be represented by the function graphed to the right?

Accepted Answer

Trevor types 40 words per minute.

Answer

Lucas rode his bike at 10 miles per hour.

Answer

A plant grew 20 inches per month.

Answer

The number of fruit flies doubled every hour.

Question 7

The chart shows how the cost per person to rent a vacation home varies with the number of people in the group. Which statement is true about this relationship?

Accepted Answer

It is a direct variation relationship because $$y=2650x$$ .

Answer

It is an inverse variation relationship because $$y=2650x$$ .

Answer

It is an inverse variation relationship because $$y=\frac{2650}{x}$$ .

Answer

It is a direct variation relationship because $$y=\frac{2650}{x}$$ .

Question 8

The time required to complete a job varies inversely as the number of people working. It took 4 hours for 7 electricians to wire a building. How long would it have taken 3 electricians to have done the job?

Accepted Answer

9 hours 20 minutes

Answer

1 hour 34 minutes

Answer

5 hours 15 minutes

Answer

7 hours 30 minutes

Question 9

Which equation represents the line that passes through the points $$\left(2,-1\right)$$ and $$\left(6,7\right)$$ ?

Accepted Answer

$$y=2x-5$$

Answer

$$y=\frac{3}{2}x-2$$

Answer

$$y=\frac{3}{2}x-4$$

Answer

$$y=2x-3$$

Question 10

Marsha recorded the time it took seven children of different ages to run one lap around the track. Using the table, what is the line of best fit?

Accepted Answer

$$y=-12.13x+272.27$$

Answer

$$y=12.13x+272.27$$

Answer

$$y=272.27x-12.13$$

Answer

$$y=0.06x^2-13.33x+277.89$$

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