MATCHING THE SQUARE ROOT FUNCTION AND ITS GRAPH WORKSHEET

Problem 1 :

Match the function and its graph. Describe the range.

1) y = √(x - 3)               2)  3√x

3)  y = √x - 3               4)  y = √(-x + 3)

matching-squre-root-fun-and-equation

Solution

Problem 2 :

Describe and correct the error in comparing the graph of

g(x) = −(1/4)√x

to the graph of

f(x) = √x

matching-squre-root-fun-and-equationq5.png

Solution

Problem 3 :

Describe and correct the error in graphing the function

y = √(x + 1)

matching-squre-root-fun-and-equationq6.png

Solution

Problem 4 :

The graph represents the function f (x) = √x .

a. What is the minimum value of the function?

b. Does the function have a maximum value? Explain.

c. Write a square root function that has a minimum value of −4.

Solution

Answer Key

1) 

  • question (3) matches with Graph A.
  • question (4) matches with Graph B.
  • question (2) matches with Graph C.
  • question (1) matches with Graph D.

2)  the error is instead of representing vertical shrink, it is said as horizontal stretch.

3)  The error is, in the graph shown the graph is move up 1 unit instead of moving left 1 unit.

4)  

a) By observing the graph, the minimum value of the function is (1, 0).

b) The function f(x) will not have maximum value.

c)  f (x) = √(x + 4)

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