Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) Name:_______________________________________________________________
Extra Credit due Thursday, February 28, 2016 1. Use the x- and y-intercepts to graph the function
a. . b. c. d. Powered by Cognero Page 1 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 2. Use the x- and y-intercepts to graph the function
a. . b. c. d. Powered by Cognero Page 2 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 3. Eric earned $200 by selling x hot dogs and y spring rolls. Each hot dog costs $2.00 and each spring roll costs $2.50. The
relationship can be represented by the function
.
Use the x- and y-intercepts to graph the function.
a. b. c. d. Powered by Cognero Page 3 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 4. Find the image of the figure after a dilation with point A as the center by a scale factor of 2.5.
a. b. c. d. Powered by Cognero Page 4 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 5. Find the image of the figure after a dilation with point A as the center by a scale factor of 2.5.
a. b. c. d. Powered by Cognero Page 5 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 6. Find the image of the figure after a dilation with point A as the center by a scale factor of 2.5.
a. b. c. d. Powered by Cognero Page 6 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 7. Find the vertices of polygon
after polygon WXYZ is dilated using the given scale factor. Graph polygon
WXYZ and polygon
.
W(–2, –1), X(–2, 3), Y(0,4), Z(0, 0); scale factor 2 8. Suppose the figure graphed below is reflected over the y-axis. Find the coordinates of the vertices after the reflection.
9. The vertices of
are A(–2, 3), B(2, 1), and C(5, 3). Graph
coordinates of the reflected image? and its reflection over the x-axis. What are the
Indicate the answer choice that best completes the statement or answers the question. 10. Identify the coordinates for the triangle ABC, when it is rotated clockwise about the origin by
.
a. c. b. d. Powered by Cognero Page 7 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) Find the coordinates of the image’s vertices. 11. A rectangle with vertices A(0, –4), B(0, –7), C(7, –7)and D(7, –4) is rotated 180° clockwise about the origin. a. A’(0, 4), B’(0, 7), C’(7, 7), and D’(7, 4) b. A’(4, 0), B’(7, 0), C’(7, –7), and D’(4, –7) c. A’(0, –4), B’(0, –7), C’(–7, –7), and D’(–7, –4) d. A’(0, 4), B’(0, 7), C’(–7, 7), and D’(–7, 4) 12. Triangle ABC has vertices
,
translation of 3 units right and 6 units up.
and
. Graph the vertices of triangle
after a
a. b. c. d. 13. Copy the figure onto graph paper. Then draw the image of the figure after a translation of 4 units right and 3 units up.
Powered by Cognero Page 8 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 14. Figure JKL has vertices J(1, 8), K(3, 4), and L(7, 9). It is translated 1 unit right and 3 units down. The translated image
is then translated again 1 unit right and 4 units down. Explain how to find the coordinates of J'K'L' after both translations. Include the new
a. coordinates with your answer. b. c. Graph the initial figure and its final translated image. Describe the final translated image in words. Indicate the answer choice that best completes the statement or answers the question. Write an equation of the line in slope-intercept form that passes through each point with the given slope. 15. (–2, –2), slope = –4 a. y = –4x – 6 b. y = –4x + 10 c. y = 4x – 10 d. y = –4x – 10 16. (0, –9), slope = 4 a. y = –4x – 9 b. y = 4x – 9 c. y = 4x + 10 d. y = 4x + 9 Write an equation of the line in slope-intercept form that passes through the pair of points. 17. (–3, –4), (–5, –12) a. y = 4x + 8 b. y = –4x + 8 c. y = 4x + 18 d. y = 4x – 8 Powered by Cognero Page 9 Name: Class: Date: 8B Extra Credit (Due Thursday, February 28, 2016) 18. (2, 6), (–8, 11) a. y = x + 7 b. y = x + 7 c. y=
x – 7 d. y=
x + 3 Write the point-slope form of an equation for a line that passes through the point with the given slope. 19. (6, –4), slope = a. y – 4 = (x – 6) b. y + 4 = (x – 6) c. y + 4 = (x + 6) d. y + 4 =
(x – 6) 20. (–6, –6), slope = 6 a. y + 6 = 6(x + 6) b. y – 6 = 6(x + 6) c. y + 6 = 6(x – 6) d. y + 6 = –6(x + 6) 21. The cost, C, of joining the sports center gym includes an initial membership fee of $139 plus a $29 monthly fee. Write
an equation in slope-intercept form to find the total cost for m months. Then graph the equation. 22. Write an equation for the line that passes through
and
. What is the slope? Powered by Cognero Page 10