Suppose the linear regression line y= -0.3x 11.2 predicts the time, in minutes, it takes you to finish an obstacle course after training for x days.

About how much time would it take you to finish the course after training for

8 days?

8.8 minutes

Step by step explanation:

Assuming you meant "y = -0.3x + 11.2" instead of "y = -0.3x 11.2", here is the (if not just let me know :) )

Since x is the variable that represents the number of days, and 8 is the number of days you will be training, let's plug 8 in for x in the equation:

y = -0.3x + 11.2 -> y = -0.3(8) + 11.2

Solving this, we get:

y = -0.3(8) + 11.2 -> y = -2.4 + 11.2 -> y = 8.8

The variable y equals the time in minutes, so our answer is 8.8.

answer: c i think

step-by-step explanation:

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be