Alain runs one mile in 9 minutes this year, while he was able to run one mile in 7.5 minutes last year. By what percent did his time decrease?

17%

Step-by-step explanation:

Divide 7.5 by 9, and then you get 0.833..., round the last digit to the closest thousandth, so you have 83. Subtract 83 from 100, and BOOM! 17! Correct me if I'm wrong!

the answer is the option b

the range is all real numbers

step-by-step explanation:

we know that

the absolute value parent function is equal to

see the attached figure to better understand the problem

so

a. it is v-shaped > is true

b. the range is all real numbers > is not true

because the range is the > [0,∞)

all real numbers greater than or equal to zero

c. it goes through the origin > is true

d. the domain is all real numbers > is true

step-by-step explanation:

if x = 1, then the answer is 3.5