The formula m= V2 - V1

X2 - X1

The product of these slopes is

This product

shows that the slopes are negative reciprocals. It is given

that the lines are perpendicular and we have shown that

the slopes of the lines are negative reciprocals.

Answer is (d-b/c-a)(c-a/-d+b)=1

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.

idk

step-by-step explanation: