Envision Math 5th Grade Textbook Answer Key Topic 18 Reteaching

Reteaching

Set A, pages 402-404

What ordered pair names Point A?
Envision Math Grade 5 Answers Topic 18 Reteaching 1
Start at the origin. The x-coordinate is the distance to the right or left along the x-axis. The y-coordinate is the distance up or down along the y-axis. Point A is at (+5, +3).

Remember to name a point on a coordinate grid, first find the x-coordinate. Then find the y-coordinate. Write the coordinates in (x, y) order.
Question 1.
Which point is located at (4, 3)?
Answer:

Question 2.
Which point is located at (+2, +2)?
Answer:

Question 3.
Which point is located at (4, +4)?
Answer:

Question 4.
What ordered pair names Point T?
Answer:

Question 5.
What ordered pair names Point W?
Answer:

Question 6.
What is the new ordered pair if Point A is moved to the left 5 spaces?
Answer:

Set B, pages 406-408

Make a line graph for the data.
Envision Math Grade 5 Answers Topic 18 Reteaching 2
Use grid paper to draw a coordinate grid. Label the axes.
Number each axis with a consistent scale.
Plot the ordered pairs and connect the points.

Remember that line graphs show data that change over time.
Question 1.
Make a line graph for the data
Envision Math Grade 5 Answers Topic 18 Reteaching 3
Answer:

Question 2.
Describe the trend.
Envision Math Grade 5 Answers Topic 18 Reteaching 4
Answer:

Set C, pages 410–411

Graph the equation y = x + 2.
Choose values for x and find the values for y.
Envision Math Grade 5 Answers Topic 18 Reteaching 5
y = x + 2
0 = -2 + 2
2 = 0 + 2
5 = 3 + 2
Use grid paper to draw a coordinate grid.
Label and number the axes.
Plot the ordered pairs and connect the points.
Envision Math Grade 5 Answers Topic 18 Reteaching 6

Remember to choose at least three values for x. The values for x and y must satisfy the equation.

Make a table of values for each equation. Then graph the equations on a coordinate grid.
Question 1.
y = x – 4
Envision Math Grade 5 Answers Topic 18 Reteaching 7
Answer:

Question 2.
y = 3x
Envision Math Grade 5 Answers Topic 18 Reteaching 8
Answer:

Question 3.
y = x + 5
Envision Math Grade 5 Answers Topic 18 Reteaching 9
Answer:

Question 4.
y = x
Envision Math Grade 5 Answers Topic 18 Reteaching 10
Answer:

Set D, pages 412-413

Franco worked on his science fair project for 35 minutes. Then he spent 20 minutes working on math homework. After that, Franco spent 45 minutes on the computer. If he logged off the computer at 8:10 P.M., what time did Franco begin working on his science fair project?
You can draw a picture to help you work backward. Use an inverse operation for each change.
Envision Math Grade 5 Answers Topic 18 Reteaching 11

Remember that addition and subtraction have an inverse relationship.
Question 1.
Barb has 3\(\frac{1}{4}\) ft of ribbon left over. She used 2\(\frac{1}{4}\) ft to wrap a gift and \(\frac{3}{4}\) ft to decorate a picture frame. She then used 1\(\frac{3}{4}\) ft for hair ribbons. How many feet of ribbon did Barb start with?
Answer:

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