Advanced MathEasy–MediumIntersection of an exponential and a horizontal line
Advanced Math practice question
In the xy-plane, the graphs of y = 2ˣ and y = 16 intersect at the point (a, 16). What is the value of a?
Answer: 4
2ᵃ = 16 = 2⁴, so a = 4.
Common wrong answers
- If you answered 3
- 3 gives 2³ = 8.
- If you answered 8
- 8 halves 16.
- If you answered 16
- 16 is the y-coordinate.
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