Practice Problem #1

At 6:00 AM in Sylacauga, the temperature is 60 degrees Fahrenheit. If the temperature from that point in time increases at a rate of 3 degrees per hour, then which of the following linear equations describes this temperature at time x (in hours)?

y = 60x +3

y = 3x + 60

y = 60 - 3x

y = 3x - 60

 

Watch the video tutorial to review the problem if you wish.

Practice Problem #2

How would you create a graph of the linear equation?

chart with arrow

Using your graph, determine which of the following reflects the temperature in Sylacauga at 11:00 AM. Check your answer by plugging in the appropriate value into the equation.

  • 55 degrees Fahrenheit
  • 99 degrees Fahrenheit
  • 63 degrees Fahrenheit
  • 75 degrees Fahrenheit

 

Watch the video tutorial to review the problem if you wish.

Practice Problem #3

You're helping a friend with homework. He is trying to graph 2y - 4x = 8 using the x and y intercepts. Your friend shows you the following possibilities for the x-intercept. Which of them is the correct x-intercept?

  • -2
  • 1
  • 2
  • 4

 

Watch the video tutorial to review the problem.

Practice Problem #4

Which of the following coordinates could be a y-intercept? Hint: Three of the choices could never be a y-intercept.

  • (0,2)
  • (1,1)
  • (4,-3)
  • (-5,0)

 

Watch the video tutorial to review the problem.

Practice Problem #5

You've been asked to graph this function:

You want to start by graphing the y = x - 2 piece. Which of the following T tables would be most helpful with graphing this piece?

A.
x y
-3  
-1  
0  

 

B.
x y
-3  
0  
4  

 

C.
x y
0  
1  
4  

 

D.
x y
4  
5  
6  

 

Watch the video tutorial to review the problem.

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