Chapter 1 Review

Which of the following have a range of

 $y\ge7$  ? (select all that apply)

•  $f\left(x\right)=-x^2+7$  

•  $f\left(x\right)=x^3+7$  

•  $f\left(x\right)=\left(x-1\right)^2+7$  

•  $f\left(x\right)=\sqrt{x-7}$  

•  $f\left(x\right)=7$  

Given

 $f\left(x\right)=2\left|x+4\right|-1$   undergoes a vertical stretch by 7. What is the new  $g\left(x\right)$  function? 

•  $g\left(x\right)=2\left|7x+4\right|-1$  

•  $g\left(x\right)=14\left|x+4\right|-1$  

•  $g\left(x\right)=7\left|x+4\right|-1$  

•  $g\left(x\right)=14\left|x+4\right|-7$  

• none of these

Which of these have a translation 3 units right and 2 units down from the parent function? (Select all that apply)

• $g\left(x\right)=\left|x-3\right|+2$

• $g\left(x\right)=\left|x+3\right|-2$

• $g\left(x\right)=\left|x-3\right|-2$

• $g\left(x\right)=\left|x+3\right|+2$

• $g\left(x\right)=3\left|x\right|+2$

Interpret the slope in the graph.

• Every week the balance goes up $100

• As time goes on the balance goes down.

• The balance is $100

• Every week the balance goes up $50.

Which 3 equations would be used to solve the following: A florist makes bridesmaid bouquets for a wedding. The budget is $160 per bouquet and must have 12 flowers. Roses (x) cost $2.50 each, lilies (y) cost $4 each and irises (z) cost $2 each. The florist wants twice as many roses as the other two types combined. What flowers should be in each bouquet?

•  $x+y+z=160$  

•  $x+y+z=12$  

•  $2.5x+4y+2z=160$  

•  $2x=y+z$  

•  $x=2y+2z$  

Solve. Write your answer as an ordered triple (x,y,z) no spaces.

Correlation coefficients are given for 4 equations below. Which one represents is the most linear data?

• $r=0.85$

• $r=-.99$

• $r=0.9$

• $r=0.1$

Tags

CCSS.HSS.ID.B.5

Given

 $y=-60x+480$  is the equation for the graph shown. Find the volume of the swimming pool after 6 hours. (Just type the number do not type units).

Tags

CCSS.HSF.LE.B.5

Use your graphing calculator/desmos to find the equation for the line of best fit for the following data points. Round your answer to 3 decimal places. (Do not put spaces in your answer).

Tags

CCSS.8.EE.B.5

If

 $f\left(x\right)=2x-5$  is reflected over the x-axis and then moved 4 right, what is the new  $g\left(x\right)\$  equation? (type your answer with no spaces).