Use this calculator only to check your answers. You are responsible to know how to compute the slope and get the slope-intercept form of the line.
Given two points (5, 2) and (1, 1), you can enter (5, 2) in the boxes labeled "(x1, y1)" or the boxes labeled "(x2, y2)". You will still get the same answer.
If you type (5,2) in the boxes labeled "(x2, y2)" and (1,1) in the boxes labeled "(x1, y1)", the calculator will show 0.25 in the box labeled "Slope = m ="
If you do not know how to find the slope or you need to remind yourself how to find the slope, check this lesson to get a thorough review.
If you want to find the slope using the two points (2,9) and (12,3), you can use the following formula:
The slope calculator will also show that the slope-intercept form is y = -0.6x + 10.2
Here is how to find the slope-intercept form.
The slope-intercept form is y = mx + b
So, y = -0.6x + b.
Substitute either (2,9) or (12,3) for (x,y) in y = -0.6x + b
Using (2,9), 9 = -0.6(2) + b
9 = -1.2 + b
b = 9 + 1.2 = 10.2
y = -0.6x + 10.2
Now, enter (2,9) and (12,3) in the slope calculator above and you will see that you will get the same answer.