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Check here for instructional material to complete this problem. Let a be the length of a song (in minutes). and let b be the number of seconds it takes to download. Identify the independent variable and the dependent variable. For the variables b and a, identify the independent variable and the dependent variable. 0 A. The variable a is the independent variable and variable b is the dependent variable. 0 B. The variable a is the dependent variable and van'able b is the independent variable. Check here for instructional material to complete this problem. a. Is the car traveling at a constant speed? A person is on a car trip. Let d be the distance (in miles) traveled in t hours of driving. The line in the figure describes the relationship between t and d. O Yes a. Is the car traveling at a constant speed? O No b. What is the speed of the car? dA b. What is the speed of the car? 300- The speed of the car is mph. 240- (Type a whole number.) 180- Miles 120- 60 . . . 3 HoursCheck here for instructional material to complete this problem. A portion of road A climbs steadily for 195 feet over a horizontal distance of 2600 feet. A portion of road B climbs steadily for 160 feet over a horizontal distance of 3200 feet. Which road is steeper? . . . Which road is steeper? O road A O road BCheck here fGI instructional maten'al to complete this problem The points (3,8) and (8,8) are plotted to the right, a. In going from point (3,8) to point (8,8), nd the change i. in the xcoordinate, ii. in the iiicoordinate, b. In going fiom p0int (8,8) to point (38), nd the change i. in the xicoordinate, ii. in the yicoordinate, 10 9,0 l3. a. In going from point (38) to point (88) i. the change in the x-coordlnate is ii. the change in the yicoordinate is b. In 90mg from point (8,8) to point (3,8) i. the change in the x-coordinate is ii. the change in the ycoordinate is Check here for instructional material to complete this problem. Use the slope formula to find the slope of the line that passes through the two given points. State whether the line is increasing, decreasing, horizontal, or vertical. (2,3) and (8,3) - . . Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The slope is m= . (Type an integer or a simplified fraction.) O B. The slope is undefined. Is the line increasing, decreasing, horizontal, or vertical? O A. increasing O B. decreasing O C. vertical O D. horizontal