MjIzMjA2MzAZODAw/t/all 10
8
6
Distance Remaining (km)
4
t
10
50
20 30 40
Time (min)
A. Write an equation that gives the distance d in kilometers Shari has left to run after she has been
running for t minutes

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct