SNNHS G9_Q2_PRETEST

Quiz by JOHN ANTHONY P. SANTOS

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- Q1
Which is an example of direct variation?

𝑦 =$\backslash frac\{2\}\{x\}$

𝑥 = $\backslash frac\{1\}\{2y\}$

𝑦 = 2𝑥

𝑥𝑦 = 2

30sEditDelete - Q2
Which is an example of inverse variation?

𝑥 = −4𝑦

𝑦 = 4𝑥

𝑥 = $\backslash frac\{y\}\{4\}$

𝑦 = $\backslash frac\{4\}\{x\}$

30sEditDelete - Q3
The length 𝑙 of a rectangular field varies inversely as its width 𝑤 is written as ____.

𝑤 = $\backslash frac\{k\}\{l\}$

𝑙 =$\backslash frac\{k\}\{w\}$

𝑙 = 𝑘𝑤

𝑤 = 𝑘𝑙

30sEditDelete - Q4
If 𝑦 varies inversely as 𝑥 and 𝑦 = 12 when 𝑥 = 4, find 𝑦 when 𝑥 = 3.

16

15

18

17

30sEditDelete - Q5
What mathematical equation describes the graph at the right?

𝑦 varies inversely as 𝑥, where 2 is the constant of variation

𝑦 varies directly as 𝑥, where 2 is the constant of variation

𝑦 varies inversely as 𝑥, where 12 is the constant of variation

𝑦 varies directly as 𝑥, where 12 is the constant of variation

30sEditDelete - Q6
Which equation represents “y varies directly as x andz”?

𝑦 = $\backslash frac\{kz\}\{x\}$

𝑦 = 𝑥𝑧

𝑦 = 𝑘𝑥𝑧

𝑦 = $\backslash frac\{kx\}\{z\}$

30sEditDelete - Q730sEditDelete
- Q8
It is defined as the variation where a quantity depends on two or more other quantities, whereas one quantity varies directly while the other quantity varies inversely.

Inverse

Combined

Joint

Direct

30sEditDelete - Q9
“The Interest earned by a savings account of Mr. Viray is jointly proportional to the Time and its Principal amount. After one quarter(3 months), the interest for a principal amount of Php 6,000 is Php 120.” How much interest is earned within 5 months if the principal amount is Php 7,500?

Php 200

Php 300

Php 250

Php 350

30sEditDelete - Q10
In the expression 3𝑥², 2 is called _____.

Literal Coefficient

Numerical Coefficient

Constant term

Exponent

30sEditDelete - Q11
Which of the following is TRUE?

(𝑏−

^{5})^{0}= 𝑏^{−5}𝑥

^{6}∙ 𝑥^{3}= 𝑥^{9}𝑎

^{0}𝑏^{2}= 𝑎𝑏^{0}$\backslash frac\{^\{x^\{-2\}\}\}\{x^5\}=x^3$

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