Iron tools were used for agriculture. Larger communities pushed into the Ganges river . They used iron tools to cultivate rice.
Answer:
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Explanation:
Answer:
1. Co-variance= -1.2
2. correlation coefficient= -0.4404
3. There is weak negative relationship between x and y.
Explanation:
1.
Co-variance= Cov(x,y)= sum[(x-xbar)(y-ybar)]/n
xbar=sumx/n=32/5=6.4
ybar=sumy/n=35/5=7
x 7 8 5 3 9
x-xbar 0.6 1.6 -1.4 -3.4 2.6
y 7 5 9 7 7
y-ybar 0 -2 2 0 0
(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0
Cov(x,y)= sum[(x-xbar)(y-ybar)]/n=-6/5=-1.2
Cov(x,y)=-1.2
2.
correlation coefficient=r
x 7 8 5 3 9
x-xbar 0.6 1.6 -1.4 -3.4 2.6
y 7 5 9 7 7
y-ybar 0 -2 2 0 0
(x-xbar)(y-ybar) 0 -3.2 -2.8 0 0
(x-xbar)² 0.36 2.56 1.96 11.56 6.76
(y-ybar)² 0 4 4 0 0
r=-0.4404
3. Since the value of correlation coefficient is negative and less than 0.5 , so, we can say that there is weak negative relationship between x and y.
Answer:
E- All of the statements are true
Explanation:
Insulin and Glucagon are hormones, both secreted by the pancreas.
Insulin functions in the conversion of carbohydrates to glycogen which is stored in the body as glucose reserves. This implies therefore that:
- A carbohydrate rich meal will stimulate the increased production of insulin.
Glucagon on the other hand, works to breakdown the glucose reserves in situations such as fasting or increased physical activity to make energy available for the body. Glucagon also functions in gluconeogenesis which is the conversion of other nutrient molecules other than carbohydrate, such as amino acids and lactate into glucose to provide energy for the body.
The function of glucagon therefore implies that:
- A protein rich meal will increase glucagon secretion
- A carbohydrate rich meal will decrease glucagon secretion since it functions on other food molecules
- Exercise will increase glucagon secretion
