Answer:
Slope = 4
Explanation:
Hi!
So, I can only see question a, so I will answer that.
This is asking for the slope given 2 points.
The line-slope formula states :
![m = ((y_(2)-y_(1)))/((x_(2)-x_(1)))](https://img.qammunity.org/2021/formulas/mathematics/high-school/wcpoocf37yxknab1j0wcxffjvschgm3zzc.png)
where m is the slope and the x and y values are the corresponding values from 2 coordinate points. The hard part of this is deciding which of your points is point 1 and which is point 2. It's arbitrary, so any selection is correct. We just have to stay consistent.
Let's let (3,12) be point 1 and (4,16) be point 2. Now we can write the corresponding x and y values into our formula:
![m = \frac{({y_(2)-y_(1)})}{(x_(2)-x_(1))}\\m = ((16-12))/((4-3))\\\\m = (4)/(1)\\\\m = 4](https://img.qammunity.org/2021/formulas/mathematics/high-school/iekqlftfbfjuj2otw5rk36y2hhubip330b.png)
So, the slope of the line through the 2 points (3, 12) and (3, 16) is 4