Find the slope of the line(s)
2 answers:
Answer:
14)
15)
16)
Step-by-step explanation:
In order to calculate the slope of a line, we can use this formula:
The procedure is:
- Choose two points on line.
- Substitute the coordinates into the formula and evaluate.
Then:
14) Point (0,0) and Point (1,2):
Slope:
15) Point (0,0) and Point (-2,2):
Slope:
16) Since it is an horizontal line, the slope is zero:
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Answer:
A
Step-by-step explanation:
We have the expression:
And we want to find its sign given that a>0 and b<0.
Notice that the expression is already negative since we have -4.
a>0 means that a is positive. Therefore, we can ignore it since it won’t do anything.
b<0 means that b is negative. Therefore, we will have two negatives being multiplied together. Hence, this will make a positive.
Therefore, the sign of our expression will be positive.
We can see this with an example. Let a=1 (1>0) and let b=-1 (-1<0). Then:
So, the sign is positive.
Hence, the answer is A.