15 is 60% of what number

25

Step-by-step explanation:

If we call the number we're looking for n, then

n * 60/100 = 15

then n = 15/0.6 = 25

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.