Analysis of the Earth and Environment Lecture 18: Understanding Curves

Question 1

Give the equation for straight lines

Answer 1

y=mx+c

m = slope/gradient of the line

c = the y intercept/at which on the y axis the line crosses it

y: The vertical coordinate of a point on the line.
x: The horizontal coordinate of a point on the line.

Question 2

Give the equation for working out the slope/gradient

Answer 2

𝑆𝑙𝑜𝑝𝑒= Δ𝑦/Δ𝑥

Vertical distance divided by the horizontal distance

change in y axis divided by change in x axis

Question 3

What is the key thing to remember when using linear regression to make predictions and draw conclusion

Answer 3

Correlation does not equal causation.

Must be very careful and thorough before coming to a conclusion.