Graphs of Functions | O Level Math

[@beetle2286]

sir how do we know that we have to substrate asked equation from main equation

[@mathwithzubair1]

For now use the same method you will get all answers quick and correct.
Other than that ill try to explain in comment
When you equate the two equations to get point of intersection or solution.
Just take one y to other side that becomes y-y =0 that becomes point of intersection on x-axis