# 2nd Quarter : PreTest in Mathematics 10

## Quiz by Ma. Carmela D. Laudit

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- Q1
Which is an example of direct variation?

𝑥 = $\backslash frac\{1\}\{2y\}$

𝑦 = 2𝑥

𝑥𝑦 = 2

𝑦 = $\backslash frac\{2\}\{x\}$

20s - Q2
Which is an example of inverse variation?

𝑦 = $\backslash frac\{4\}\{x\}$

𝑥 = −4𝑦

𝑦 = 4𝑥

𝑥 = $\backslash frac\{y\}\{4\}$

20s - Q3
The length 𝑙 of a rectangular field varies inversely as its width 𝑤 is written as ____.

𝑙 = $\backslash frac\{k\}\{w\}$

𝑙 = 𝑘𝑤

𝑤 = 𝑘𝑙

𝑤 = $\backslash frac\{k\}\{l\}$

20s - Q4
If 𝑦 varies inversely as 𝑥 and 𝑦 = 12 when 𝑥 = 4, find 𝑦 when 𝑥 = 3.

17

18

16

15

20s - Q5
What mathematical equation describes the graph below?

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

𝑦 varies inversely 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 2 is the constant of variation

30s - Q6
Which equation represents “y varies directly as x and z”?

𝑦 = $\backslash frac\{kx\}\{z\}$

𝑦 = 𝑘𝑥𝑧

𝑦 = 𝑥𝑧

𝑦 = $\backslash frac\{kz\}\{x\}$

20s - Q720s
- 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.

Combined

Direct

Joint

Inverse

20s - Q9
“The Interest earned by a savings account of Mr. Viray is jointly proportional to the Time and its Principal amount. After one quarter (3months), 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 250

Php 300

Php 200

Php 350

60s - Q10
In the expression 3𝑥², 2 is called _____.

Literal Coefficient

Constant term

Numerical Coefficient

Exponent

15s - Q11
Which of the following is TRUE?

(𝑏−

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

𝑎

^{0}𝑏^{2}= 𝑎𝑏^{0}𝑥

^{6}∙ 𝑥^{3}= 𝑥^{9}20s - Q1220s
- Q1330s
- Q1445s
- Q1530s