1. D
2.B
4.D
<h3>
Further explanation</h3>
<u>Problem 1</u>
The formula for calculating slope or gradient of the line that passes through the given points is given by

Let's find out the slope of each option until we find the slope of ²/₃.



It corrects, this is the answer.
<u>Problem 2</u>
Given two points, i.e., (6, -1) and (-3, -1).


The formula for calculating slope or gradient of the line that passes through the given points is given by



Therefore, the slope is 
<u>Problem 4</u>
Given
which is a standard form.
Let us write the equation in slope-intercept form
with the coefficient m as a gradient and k as y-intercept.

Both sides multiplied by ⁵/₄ so y becomes a subject.

Both sides subtracted by 

This format is following the slope-intercept form, thus the slope is
and y-intercept is 5.
<h3>Learn more</h3>
- Determine the line equation, in slope-intercept form, that is parallel to the given line and passes through a point brainly.com/question/1473992
- The midpoint brainly.com/question/3269852
- Determine the equation represents a line that passes through (–2, 4) and has a slope of 1 brainly.com/question/4819659
Keywords: which, two points lie on the line, the slope, gradient, the equation, the slope-intercept form, standard form