9G Q2 Unit Yest in Mathematics 9

1) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
Which type of variation best describes this statement?

• Direct Variation

• Inverse Variation

• Joint Variation

• Combined Variation

2) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
Which of the following variables is the dependent variable?

• time

• speed

• distance

• battery life

3) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
Which of the following variables is the independent variable?

• time

• speed

• distance

• battery life

4) TRUE or FALSE
The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
The speed (s) of the e-bike varies directly with its battery life (b).

• TRUE

• FALSE

5) TRUE or FALSE
The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
The faster the speed (s), the shorter the battery life (b).

• TRUE

• FALSE

6) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
Which of the following graphs best illustrates the variation?

• 
• 
• 
• 

7) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
Which of the following equations represents variation?

• b = k/d

• d = ks

• b = k/s

• t = d/k

8) The battery life (b) of an electric bicycle decreases the faster the speed (s) you drive it.
b = 30 hrs and s = 16 km/hr
What would be the value of k or the constant of the variation?
(Just type the number)

9) Use the variation equation above.
If speed (s) is 48 km/hr, what is the value of the battery life (b)?
(Just type the number)

9) Use the variation equation above.
If the battery life (b) is 2 days or 48 hours, what is the value of speed (s)?
(Just type the number)