Answer:
D: -3
Step-by-step explanation:
In order to find a slope of a line from two pairs, one way you can do that is by using a formula.
The formula is as follows:
Y² - Y¹
⁻⁻⁻⁻⁻⁻⁻⁻⁻
X² - X¹
Using this formula, let's plug in our values.
1. Our first Y, is -4. Place that into the equation above for Y².
2. Our second Y, is 8. Place that into Y¹. Wait! Since it's negative in the equation, your positive eight must turn into a -8.
3. Our first X, is 3. Just like our first Y, plug it into your X².
4. Our second X, is -1. Since it is already negative, and the equation is has a negative in it, the negative plus a negative makes the number positive.
Your equation should look like this: (now solve)
-4 - 8 -12
----------- = ------
3 + 1 4
Great, you've made it this far, there's ONE more step! Simplify the problem!
4 goes into 12, 3 times! This is because 4x3 is 12! Since your 12 is negative, your answer MUST stay negative, leaving your answer as -3.
If this leaves you confused, feel free to ask me more questions! :)
(10)(13)