What is the gradient of the straight line passing through the points with coordinates (2, –3) and (–1, 6) ?
A. –1
B. – 9
C. – 3
D. -\frac{1}{9}
E. -\frac{1}{3}
What is the gradient of the straight line passing through the points with coordinates (2, –3) and (–1, 6) ?
A. –1
B. – 9
C. – 3
D. -\frac{1}{9}
E. -\frac{1}{3}