The following equation represents the proportionality of two variables: y = -2x If the value of x increases, which of the following is true regarding the value of y?
A) It will become independent of x.
B) It will decrease.
C) It will increase.
D) It will remain unchanged.
B
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A left lateral chest projection obtained with the patient's left side rotated anteriorly demonstrates the
1. anterior and posterior ribs with more than 0.5 inch (1 cm) of superimposition. 2. heart shadow entirely posterior to the sternum. 3. right hemidiaphragm inferior to the left hemidiaphragm. 4. humeral soft tissue superimposed over the anterior lung apices. a. 1 only b. 1 and 2 only c. 3 and 4 only d. 1, 2, and 4 only
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Early dental film required long exposure times because:
a. it was hand-wrapped. b. the emulsion was only on one side. c. glass plates were used as the base. d. the packets were not moisture resistant.
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