Answer:
First find the gradient (m).
- Pick any two points on x axis and their corresponding points on y axis in this format (x,y).
- point 1 (10,5) and point 2 (20,10)
- Gradient = (y2-y1) /(x2-x1)
- = (10-5)/(20-10)
- =5/10
- Gradient (m)=1/2
Now that you know gradient, solve using either of the points you picked as shown below: Note pick a third in letters not numbers example point 3 (x,y)
- Lets use point 1 (10,5) and point 3 (x,y).
- Gradient = (y-5)/(x-10) : Note we already know gradient is 1/2
- so, 1/2 = (y-5) / (x-10)
- Rearranging and simplifying: y-5 = (1/2)(x-10)
- y-5=(1/2 x) - 5
- Add 5 to both sides
- y-5+5=(1/2x)-5+5
- y=1/2x+0
Final answer y=1/2x or y=0.5x
Explanation: