‘Find the gradients of the lines joining the following pair of points – (P+Q-1, Q+P-3) and (P-Q+1, Q-P+3)
Gradient (m)= change in y/change in x= (y2-y1)/(x2-x1)
Y2-Y1= Q-P+3-Q+P-3=0
X2-X1= P-Q+1-P+Q-1=0
0/0= error- so how does the textbook come to the answer of (P-3)/(Q-1)?
Gradient (m)= change in y/change in x= (y2-y1)/(x2-x1)
Y2-Y1= Q-P+3-Q+P-3=0
X2-X1= P-Q+1-P+Q-1=0
0/0= error- so how does the textbook come to the answer of (P-3)/(Q-1)?