+168 The line passing through (4, a) and (8, 1) has gradient 3/4.
How do I work out the value of a?
thanks
+36915 Gradient is the same thing as slope
The equation for slope is rise/run= (y1-y2) / (x1-x2) = (a-1) / (4-8) = 3/4 now solve for 'a'
a-1 = -3
a= -2
