Concept:The gradient of the line is the value of m in y=mx−4.Explanation:The point (−4,16) lies on the line, so substitute x=−4 and y=16 into y=mx−4.16=m(−4)−416=−4m−4Add 4 to both sides:20=−4mDivide both sides by −4:m=−5Answer:The gradient of the line is −5.Correct option: A. −5