Une étude sur les heures d'absence durant la 1 semaine de l'année scolaire a été réaliser sur un échantillon d'élèves, a donné ce qui suit : 2;3;4;0;1;0;0;1;3;1;2;2;3;2;0;2;3;3 ;4;3

1/800 is the right answer

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

5

step-by-step explanation:

step-by-step explanation: