Since all the points lie on a straight line, we can find the exact relationship using the formula for a straight line:
y = a + bx
To find the slope, calculate the change in y per unit change in x:
In this case, calculate the quotient of the change in y and the change in x, from point 1 to point 2:
b = 0.002 = slope
This means that when
x increases by 1,
y increases by 0.002.
