Ataxi company charges a $ 3.00 flat fee plus $ 0.25 for every mile .

T(m) the cost of a taxi ride as a function of the miles driven
T(m)=3+0.25m $3 flat fee plus $0.25 per mile driven
$3 is added on as the y-intercept, or the initial fee. and 0.25 is the slope of the equation, given to you in the phrase "quantity per mile," per being the tip-off. this sentence also tells you that "miles" is our independent variable (basically our "x") because it comes after the "per."

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.