Direct variation is y=kx where k is a constant
the fiest way to see if it is direct or not, is if x increases, then y increases as well,
then we see if y=kx is valid, basically if we have a constant of variation
the first one x increase and y increase
see if same constant
y=kx
-4.5=-3k
1.5=k
so
see next one
-1 and 3
-3=-1(k)
-3=-1(1.5)
-3=-1.5
false
not it
2nd is increase and y decrease, so not direct variation
3rd is x is same but y increase so nope
4th is x increase and y increase, now test the constant
-7.5=-3k
2.5=k
-1 and -2.5
-2.5=-1k
-2.5=-1(2.5)
-2.5=-2.5
true
answer is last option
Well, each centimeter is 10 millimeters. 25cm=250mm
The slope is 5/1. This is because it goes up 5 units and right one unit. This corresponds with the fact that slope is the rise/run on a line.
Answer:
11 inches
Step-by-step explanation:
Let the level of ground level be g
On first day, amount of snow melted by 3 inches
So, level of ground melted= (g- 3) inches
Next day, amount of snow melted by 8 inches
So, level of ground level melted = (g- 3-8 )inches
Hence, total change in the ground level = ( g- 11) inches
Hence, amount of snow on ground level melted by 11 inches
Hence, the correct answer is 11 inches
Here ya go. Hope this helps. Have a great day
