e goo V | 60% 5:11 PM 7. Use the given point and slope to write (a) an equation of the line in point-slope form and (b) an equivalent equation of the line in slope-intercept form. m = 3, ( - 8, - 2) a) The equation of the line in point-slope form is (Type an equation.) b) The equation of the line in slope-intercept form is (Type an equation.):alll 59% 5:12 PM 19. While driving a car, you see a child suddenly crossing the street. Your brain a) Find D(5). D(20), D(50), and D(65). registers the emergency and sends a signal to your foot to hit the brake. The car travels a reaction distance D, in feet, during the time it takes you to react, where D(5) = D is a function of the car's speed r, in miles per hour. That reaction distance is a D(20) = linear function given below. Complete parts (a) through (d). D(50) = 19r + 9 D(65) = D() = - 18 (Round to the nearest tenth as needed.) b) Choose the correct graph of D(r). OA O B. & 30- 1 30 Dj In feet Distance (D) in feet DE 30 Speed (r) in mph Speed (r) in mph O C. O D. DE 8 307 Q Distance (D) In feet Distance (D) In feet of 30 Speed (r) In mph Speed (r) in mph c) Interpret the meaning of the slope in the context of this problem. For every 1-mph (1) in speed, the braking distance (2) by (3) d) What is the domain of this function? The domain is (Type your answer in interval notation.) (1) O increase (2) O decreases (3) O 1.1 ft. O decrease increases O 1.1 in O remains constant O 1.1 miles.:all 59% 5:14 PM Ama com 21 11. Find (a) the slope (if it is defined) of a line containing the two given points, (b) the equation of the line containing the two points in slope intercept form, and (c) the ordered pair identifying the line's y-intercept, assuming that it exists. If appropriate, state whether the line is vertical or horizontal. (6 -5) and (-4 - 4) a) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The slope is (Type an integer or a simplified fraction.) O B. The slope is undefined. The line is (1) b) Select the correct choice below and fill in the answer box to complete your choice. (Type an equation.) O A. The slope is defined. The equation of the line in slope-intercept form is O B. The slope is undefined. The equation of the line is c) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The y-intercept exists and its coordinates are (Type an ordered pair, using integers or fractions. Simplify your answer.) O B. The y-intercept does not exist. (1) O vertical. O horizontal. O ineither horizontal nor vertical