AnswersMathematics 8Input-Output Relationships

Input-Output Relationships — Test Answers

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The given table shows the predicted number of words Janae can type, y, in x minutes. Time ( x , in minutes) Words Typed ( y ) 5 150 10 300 15 450 20 600 Which describes the pattern in the table?

A
Janae types 145 words each minute.
B
Janae types 150 words each minute.
C
Janae types 30 words each minute.
D
Janae types 25 words each minute.
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Which relation is a function of x ?

A
Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 3'; Column 2, 'negative 1' Row 3: Column 1, 'negative 2'; Column 2, '5' Row 4: Column 1, '4'; Column 2, '0' Row 5: Column 1, '7'; Column 2, 'negative 1'
B
Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 8'; Column 2, 'negative 9' Row 3: Column 1, 'negative 8'; Column 2, '2' Row 4: Column 1, '1'; Column 2, 'negative 9' Row 5: Column 1, '1'; Column 2, '2'
C
Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 5'; Column 2, '1' Row 3: Column 1, 'negative 5'; Column 2, '7' Row 4: Column 1, 'negative 5'; Column 2, 'negative 9' Row 5: Column 1, 'negative 5'; Column 2, '2'
D
Table with 2 columns and 5 rows.Row 1: Column 1, 'x'; Column 2, 'y' Row 2: Column 1, 'negative 1'; Column 2, '7' Row 3: Column 1, '2'; Column 2, 'negative 9' Row 4: Column 1, '2'; Column 2, '8' Row 5: Column 1, '3'; Column 2, 'negative 4'
23

Which graph is a function of x ?

A
Image with description Coordinate plane with x- and y-axes labeled. Both axes range from negative 4 to 4 in increments of 2. A vertical line with arrowheads at both ends passes through x equals negative 3.
B
Image with description On a coordinate plane, the x axis ranges from negative 5 to 5 in increments of 1. The y axis ranges from negative 5 to 5 in increments of 1. A graph resembling the letter V has its vertex at (1 comma 0) and passes through the points (0 comma 3) and (2 comma 3).
C
Image with description On a coordinate plane, the x axis ranges from negative 5 to 5 in increments of 1. The y axis ranges from negative 5 to 5 in increments of 1. Two curves on the plane resemble the sideways letter Vees, with one opening to the right and the other to the left. The vertex of the first V is at (negative 1 comma 0) and passes through the points (negative 4 comma 4) and (negative 4 comma negative 4). The vertex of the second V is at (1 comma 0) and passes through the points (4 comma 4) and (4 comma negative 4).
D
Image with description Coordinate plane with x- and y-axes labeled. Both axes range from negative 4 to 4 in increments of 2. A sideways curve has its leftmost point at (negative 3 comma 1). Two branches extend to the right with arrowheads. The upper branch passes through approximately (0 comma 3) and continues upward to the right. The lower branch passes through approximately (0 comma negative 1) and continues downward to the right.
24

The given table shows the amount of money Sarah spends for a craft demonstration Number of People Attending Cost 5 $15 8 $18 10 $20 15 $25 Sarah spends a total of $60. Based on the information in the table, how many people attended the craft demonstration?

A
50
B
70
C
30
D
20
25

What is the rate of change of the function represented by the table?

A
negative 2 point 5
B
2 point 5
C
negative 1
D
1

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