This equation shows how a sapling's height depends on its age. h = 3a The variable A represents the age of the sapling in years, and the variable h represents the height of the sapling in inches. How old was the sapling when it was 18 inches tall? blank years

6 years

Step-by-step explanation:

Since each year adds 3 inches that means it would take 6years

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.