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Question

# Function of two cars are given below: Which car has more speed?

A
Can't be determined
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B
Car B
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C
Both have same speed
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D
Car A
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Solution

## The correct option is D Car ASpeed of the car = slope = DistanceTime Equation of Car A: y = -15 + 40.5x The above equation is in the form of y = mx + c, where 'm' indicates the slope which is also speed of the car. Comparing the equation y = -15 + 40.5x with y = mx + c, we get: Slope (m) = 40.5 ∴ Speed of Car A = 40.5 kmph For Car B: The function is passing through the points (3,150) and (6,270) So, Slope (m) = Change in yChange in x =270 − 1506 − 3 =1203 =40 Slope = 40 ∴ Speed of Car B = 40 kmph Therefore, Car A has more speed than Car B.

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