Question

Which expression can be simplified to find the slope of the trend line in the scatterplot?

Answer 1

Answer: 35-21/8-4

Step-by-step explanation:

Answer 2

Answer:  $\frac{35-21}{8-4}$

Step-by-step explanation:

The slope of a line equals to the difference between points' y-coordinates divided by the difference between their x-coordinates.

That is, if $(x_1,y_1)$ and $(x_2,y_2)$ are the point of a line,

Then the slope of the line is,

$m=\frac{y_2-y_1}{x_2-x_1}$

By the given diagram,

$x_1=4$, $y_1=21$, $x_2=8$ and $y_2=35$

Thus, the slope of the given line

= $\frac{35-21}{8-4}$

⇒ Fourth option is correct.