The numbers below represent the speeds of the last 6 vehicles that a police officer recorded: 68, 72, 78, 59, 73, 70 Find the mean absolute deviation of the numbers, and round to the nearest tenth if necessary.​

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

Find the value of x for which line a is parallel to line b