Answer:
I think it is 2/9 or 0.22
Explanation:
You know they have the same y intercept, so first you should find the y intercept of the givern equation.
x+2y = 10
2y = -x + 10 [subtract x]
y = -.5x + 5 [divide by 2]
Now you have the equation in graph form, and know the y intercept is 5.
If the unknown function has the same y intercept, you know it contains the point (0,5), and it is given that it includes the point (9,7)
now that you have two points, you can use slope formula.
(y2 - y1)/(x2-x1)
(change in y)/(change in x)
so,
(7-5)/(9-0) = 2/9 = 0.2
someone please correct me if i'm wrong:)