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06 Jul 2022, 01:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
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73% (01:49) correct
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There are two different scales, the X-scale and the Y-scale; they are are related linearly. Measures on the X-scale of 10 and 30 correspond to measurements on the Y-scale of 30 and 60, respectively. What measure on the X-scale corresponds to a measure of 90 on the Y-scale?
(A) 20
(B) 40
(C) 50
(D) 60
(E) 70
Are You Up For the Challenge: 700 Level Questions
(A) 20
(B) 40
(C) 50
(D) 60
(E) 70
Are You Up For the Challenge: 700 Level Questions
06 Jul 2022, 02:26
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Its a coordinate geometry problem
Coordinates that are given in (x,y) form will be
(10,30) and (30,60)
We can calculate slope = 60-30/30-10 = 30/20 = 1.5
Eq of line: y = mx + c (c is the y intercept)
Substituting any 1 coordinate to find value of c
30 = 10*1.5 + c
c = 15
Now to find x coordinate for y=90
90 = 1.5x + 15
x = 50
Answer - C
Posted from my mobile device
Coordinates that are given in (x,y) form will be
(10,30) and (30,60)
We can calculate slope = 60-30/30-10 = 30/20 = 1.5
Eq of line: y = mx + c (c is the y intercept)
Substituting any 1 coordinate to find value of c
30 = 10*1.5 + c
c = 15
Now to find x coordinate for y=90
90 = 1.5x + 15
x = 50
Answer - C
Posted from my mobile device
06 Jul 2022, 02:38
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"They are are related linearly"
y = ax + b
So
30=10z+b
60=30a+b
Solving for a, and b
a=1.5
b=15
y=1.5x+15
When y = 90
90 = 1.5x + 15
=> x=50
The answer is thus (C).
y = ax + b
So
30=10z+b
60=30a+b
Solving for a, and b
a=1.5
b=15
y=1.5x+15
When y = 90
90 = 1.5x + 15
=> x=50
The answer is thus (C).
