Need help please!!

John began his job making $25 the first day. After that he was paid $6.75 per hour.Make a T-table for the equation for this, using the x-values 0, 20, 40. Type in the ordered pairs you get as your answer, in this form: (0, number), (20, number), (40, number).

Question

Need help please!!

John began his job making $25 the first day. After that he was paid $6.75 per hour.Make a T-table for the equation for this, using the x-values 0, 20, 40. Type in the ordered pairs you get as your answer, in this form: (0, number), (20, number), (40, number).

fretje · Answer

pairs are formed with the absis and ordinate (x,y) while the function y=f(x)=25+6,75*x
solving for y gives for the x values 0,20,40 respectively :
25/160/295  so the cpouples are (0,25),(20,160),(40,295).

anonymous · Answer

How did you get that... I'm still confused...

fretje · Answer

We need to have a view on John's money bag on certain times.  For time I chose variable X, supposing time is linear.  There is a relation between that time and the money in the pocket of John.  The total amount of money it contains I called variable Y.
Let us find the relation.  In the question is stated on time zero (after zero hours of work, or thus after the first day) John has 25$.  From then on I suppose the time starts counting, and every hour he gets another 6,75$.  This is a linear equation first degree, with two unknowns, and with initial condition not zero.  Hence the form Y=Constant+a.X  where Constant is 25$ (his initial amount), and the slope of the function 'a' is 6.75$/hour (we call that slope ri.co. or Richtingscoefficient)
I can see why different interpretations of the question are possible.  I hope I got it right.
I am tired, if still not clear, can you please explain your confusion?
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