Question

stabiliti daca marimile a si b din tabel sunt direct proportionale.Va rog frumos repede!!!​

Answer 1

Răspuns:

Daca a si b sunt direct proportionale inseamna ca:

(1/3)/20 = (2/3)/40 = (3/4)/45 = (4/5)/48

(1/3)/20 = (2/3)/40 <=> 20 * 2/3 = 40 * 1/3 <=> 40/3 = 40/3

(1/3)/20 = (3/4)/45 <=> 20 * 3/4 = 45 * 1/3 <=> 60/4 = 45 / 3 <=> 15=15

(1/3)/20 = (4/5)/48 <=> 20 * 4/5 = 48 * 1/3 <=> 80/5 = 48/4 <=> 16 = 12 (fals) =>

=> Marimile a si b NU sunt direct proportionale