-9/7
which would be -1 2/7, but slope is not done in mixed fractions.
In the equation
you would be solving linear equations to find the answer to a question
1 50-50
2 1/4
3 1/3 this is all about fractions
Approximately 1718 have a score within that range.
We calculate the z-score for each end of this spectrum:
z = (X-μ)/σ = (2.5-3.1)/0.3 = -0.6/0.3 = -2
Using a z-table (http://www.z-table.com) we see that the area to the left of, less than, this z-score is 0.0228.
For the upper end:
z = (3.7-3.1)/0.3 = 0.6/0.3 = 2
Using a z-table, we see that the area to the left of, less than, this z-score is 0.9772.
The probability between these is given by subtracting these:
0.9772 - 0.0228 = 0.9544.
This means the proportion of people that should fall between these is 0.9544:
0.9544*1800 = 1717.92 ≈ 1718
Slope formula is :
y₂-y₁ / x₂-x₁
Our points are : (2, 6) & (-4, -6)
y₂ = -6 ; y₁ = 6 ; x₂ = -4 ; x₁ = 2
So, now that we have our points and values, we simply plug everything into our slope equation.
y₂-y₁/x₂-x₁
-6 - 6/-4 - 2
Simplify.
-12/-6
Simplify.
2
Our slope is 2
~Hope I helped!~
