Respuesta :

It has to be the 3rd or 4th because they're the only ones that show positive correlation. 3rd shows change of 0.5 with x axis and 4th shows change of 0.5 in y axis but the question doesn't specify which one it is. 

Answer:

Graph 4

Step-by-step explanation:

We are given four graph of different rate. We need to choose graph whose rate is 0.5

Rate of graph is equal to slope.

Slope is change in y over change in x.

[tex]\text{Slope }=\dfrac{Rise}{Run}[/tex]

Here, slope is 0.5. It is positive value.

So, graph will start from bottom left to right top.

Out of four graph only two graph which has same property.

Graph 3 and Graph 4.

Now we find the rate of each graph.

Graph 3:

First we take two point from graph.

(0,-1) and (1,1)

[tex]Slope=\dfrac{1+1}{1-0}=\dfrac{2}{1}[/tex]

Thus, Rate is 2

Graph 4:

Two points are (0,-1) and (2,0)

[tex]Slope=\dfrac{0+1}{2-0}=\dfrac{1}{2}=0.5[/tex]

Thus, rate is 0.5

Hence, Graph 4 is correct whose rate 0.5