Question

Find the slope of the line that passes threw (3,11) and (8,9)

Answer 1

Step-by-step explanation:

First thing you do is fine gradient. To do this use the formula:

$\frac{y 1 - y2}{ x1 - x2}$

$\frac{9 - 11}{8 - 3 } = \frac{ - 2}{5}$

Then use this formula to find equation of the line:

y = mx + c where m is the gradient

Then Substitute in a point and the calculated gradient value to get c

11 = -0.4 x 3 + c

c = 12.2

Therefore the equation of the line is:

y = -0.4x + 12.2

Answer 2

Answer:

y = -0.4x + 12.2

Step-by-step explanation: