Monthly 2 Graded Homework Gr-7

What is the domain of the relation shown on the graph?

• {1,5}

• {-3,-1,1,5}

• {-5,-4,-2,0,5}

Determine whether the relation is a function

• Function

• Not a Function

Determine whether the relation is a function

• Function

• Not a Function

For f(x) = –2x + 7, find the value of f(–1) + f(4).

• 9

• 8

• -1

• 1

For f(x) = 2x + 15, find f(6)

• 12

• 6

• 27

Which relationship between time and distance is NOT a function?

• 
• 
• 

The graph of 4x – y = –5 is shown. Does 4x – y = –5 represent a function? Explain your reasoning

• Yes; for each element of the domain, there is only one element of the range.

• No; the line crosses the axes in two points.

• Yes; the domain and range both include negative numbers.

This graph shows the relationship between the time George walked and the distance he is from school. Analyze the graph and then choose the most accurate description for the relationship.

• It shows that after George left school he walked up a hill for a long time.

• It shows that after George left school he walked very quickly for a long distance, then walked on a flat surface for a short time, then walked very slowly for a longer distance.

• It shows that after George left school he walked slowly for a short distance, then stopped for a little while, then walked very quickly for a longer distance.

Solve $\frac{x+15}{10}=\frac{2}{5}$     

• -13

• -11

• 1

• 19

Solve  $\frac{21}{x}=\frac{14}{4}$ 

•  $2\frac{2}{3}$  

• 6

• 73.5