Answer:
Function A is linear. Equation of A is <em>y = 1.67x +0</em>
<u>explanation</u>:
Function B shows that its not a linear function as the slope changes. Linear function always has the same slope. So function A is linear. and proportional in every step. Visual image given below.
To find the equation of A:
Take out <em>two points </em>from table: ( 3, 5 ) , ( 6 , 10 )
use the slope formula to find slope:
:
: <em> or 1.67 ..</em><em>.this is slope in 2 decimal places, m</em>
then formula to find equation: y - y1 = m( x - x1 )
: y - 5 = 1.67 ( x - 3 )
: <em>y = 1.67x +0</em>
Answer:
The car was moving approximately at a speed of 37.74 miles per hour.
Step-by-step explanation:
We are given the following in the question:
The stopping distance of a car is given by
where d is the stopping distance in feet and r is speed of the car in miles per hour.
The stopping distance is 75 feet, we have to find the speed of the car,
Putting d = 75 in the equation, we get,
Thus, the car was moving approximately at a speed of 37.74 miles per hour.