Unit 1 Test 1A Linear Functions

Which is the equation of the line that passes through the point (2, -2) and has a slope of 3?

• $y=3x-2$

• $y=3x-8$

• $y=2x+3$

• $y=22x+2$

What is the equation of the line with a y-intercept of –3 and a slope of 2?

• $y=-2x-3$

• $y=3x+2$

• $y=2x-3$

• $y=-3x+2$

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Which graph shows the solution set (as a purple overlap) to the given system of inequalities?

 $y\le2x+3$ 
 $y\ge-x+4$  

• A

• B

• C

• D

Tags

CCSS.HSA.REI.D.12

Jimmy brings $24 to the county fair for rides. Roller coaster rides cost $2, and the spinning cup rides cost $3. But Jimmy knows that he gets queasy if he takes more than 6 roller coaster rides or more than 8 spinning cup rides. Let r represent the number of roller coaster rides and let s represent the number of spinning cup rides.

In addition to r > 0; s > 0 , which is a set of of inequalities that Jimmy can use to guide his choice of rides?

• $r+s\le24$

• $2r\le6;\ \ \ 3s\le8$

• $r+s\le24;\ \ \ r\le6;\ \ \ s\le8$

• $2r+3s\le24;\ \ \ r\le6;\ \ \ s\le8\$

Margaret goes to the county fair with $35. Rides cost $3 each. Which is the function that gives the amount of money m that Margaret has as a function of the number of rides r that she takes?

• $m=3r+35$

• $m=35r-3$

• $m=35r+3$

• $m=-3r+35$

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

 $r\le6;\ \ 2r+3s\le24;\ \ s\le8$  

Which ordered pair lies in the solution region that is common to all of the inequalities?

•  $\left(2,\ 9\right)$  

•  $\left(10,\ 10\right)$  

•  $\left(2,\ 0\right)$  

•  $\left(1,\ 22\right)$  

Tags

CCSS.HSA.REI.D.12

Which is the solution to the following system of equations  $\left\{y-3x=-7,\ \ \ y=-4x+7\right\}$ ?

•  $\left(-1,\ 2\right)$  

•  $\left(-2,\ -1\right)$  

•  $\left(2,\ -1\right)$  

• Infinite Solutions

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the solution to the following system of equations  

 $2x-y=1$  
 $x+3y=11$  

• No Solution

•  $\left(-2,\ -3\right)$  

•  $\left(2,\ 3\right)$  

•  $\left(2,\ -3\right)$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the solution to the following system of equations  $2x+y=0$  

 $-4x-y-3z=1$  

 $3x+y+2z=2$  

• No Solution

•  $\left(8,\ -16,\ 5\right)$  

• Infinite Solutions

•  $\left(-8,\ 16,\ 5\right)$  

 Solve the system by elimination.
 $5x+2y=6$  

 $9x+2y=22$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6