6. are the most vulnerable roadway users.
a. pedestrians and bicyclists
b. motorcyclists
c. slow-moving vehicles
d. vehicles towing trailers

A. Pedestrians and bicyclists. They are the most vulnerable because they have little or no protection if they are struck by a motorized vehicle. Slow-moving vehicles (such as farm equipment) and vehicles towing trailers account for plenty of accidents. The National Agriculture Safety Database notes that as many as two out of three highway accidents involve a slow-moving vehicle. But those vehicles and their drivers are not the ones in a vulnerable position -- the weight and size of such vehicles protects their operators. The National Highway Traffic Safety Administration reported that in 2015, 5,376 pedestrians and 818 bicyclists lost their lives in crashes where they were hit by a motor vehicle. That was 18% of the traffic fatalities reported in that year..

d

step-by-step explanation:

an inequality is an expression which means more than one number is a solution. we graph the solutions on a number line to show all possible values. we graph using circles and arrows.

equal to and less/greater than are graphed with filled in circles on the value.only less/greater than (not equal to) are graphed with open (not filled in) circles on the value.we draw an arrow the direction the solutions satisfy the inequality. generally this is the direction the inequality itself points.

this is a filled in circle on -2 so this is . this means only answers c and d are options.

answer d points to the right.