Unit Test — Unit test

Question 1

If f(x) = |x| + 9 and g(x) = –6, which describes the range of (f + g)(x)?

Revolt · Accepted Answer

(f + g)(x) 3 for all values of x

Question 2

If a(x) = 3x + 1 and , what is the domain of ?

Revolt · Accepted Answer

mc017-5.jpg

Question 3

The cost, c, of a ham sandwich at a deli varies directly with the number of sandwiches, n. If c = $54 when n is 9, what is the cost of the sandwiches when n is 3?

Revolt · Accepted Answer

$18

Question 4

To determine whether a graph of a relation is also a function, Shayla declares that the y-axis is a vertical line and counts the number of times that the graph intersects the y-axis. If the graph has exactly one y-intercept, Shayla concludes that the graph shows a function. In all other cases, she declares that it is not a function. Is Shayla applying the vertical line test correctly?

Revolt · Accepted Answer

No, because using the y-axis tests only whether x = 0 is mapped to multiple values.

Question 5

Which graph represents the same relation as the table below?xf(x)–25011–12–3

Revolt · Accepted Answer

A coordinate plane has 4 points. The points are (negative 2, 5), (0, 1), (1, negative 1), (2, negative 3).

Unit Test — Unit test Answers

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