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Point A and B are in the first quadrant,point O is the origin. If the slope of OA is 1,slope of OB is 7 and OA=OB,Then slope of AB is:

A

`-1//5`

B

`-1//4`

C

`-1//3`

D

`-1//2`

Text Solution

Verified by Experts

The correct Answer is:
D
`tantheta=7`
` OA=OB=r`
`sintheta=(7)/(5sqrt2)costheta=(1)/(5sqrt2)`
Now, `m_(AB)=1//2`.
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