ISEE Upper Level Quantitative : Lines

Study concepts, example questions & explanations for ISEE Upper Level Quantitative

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Example Questions

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Example Question #81 : Isee Upper Level (Grades 9 12) Quantitative Reasoning

What is the slope of a line that passes through points  and ?

 

Possible Answers:

Correct answer:

Explanation:

The equation for solving for the slope of a line is 

Thus, if  and , then:

Example Question #11 : Lines

What is the slope of a line that passes through points  and ?

 

Possible Answers:

Correct answer:

Explanation:

The equation for solving for the slope of a line is 

Thus, if  and , then:

Example Question #92 : Geometry

Tangents 1

Figure NOT drawn to scale

In the above figure,  and  are tangent segments. The ratio of the length of  to that of  is 5 to 3. Which is the greater quantity?

(a) 

(b) 

Possible Answers:

(b) is the greater quantity

(a) is the greater quantity

It is impossible to determine which is greater from the information given

(a) and (b) are equal

Correct answer:

(a) is the greater quantity

Explanation:

For the sake of simplicity, let us assume that the lengths of  and  are 5 and 3; this reasoning depends only on their ratio and not their actual length. The circumference of the circle is the sum of the lengths, which is 8, so  and  comprise  and  of the circle, respectively. Therefore,

; and

.

If two tangents are drawn to a circle, the measure of the angle they form is half the difference of the measures of the arcs they intercept, so

This is greater than .

 

 

Example Question #1 : How To Find A Ray

Which is the greater quantity?

(a) The length of the line segment connecting  and 

(b) The length of the line segment connecting  and 

Possible Answers:

(a) and (b) are equal.

(b) is greater.

(a) is greater.

It is impossible to tell from the information given.

Correct answer:

(a) and (b) are equal.

Explanation:

(a) The length of the line segment connecting  and  is 

.

(b) The length of the line segment connecting  and  is 

.

The segments have equal length.

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