A.) A linear function y=f(x) satisfies f(2)=1 and f(-2)=5: Find the function of f(x), find the values f(9) and f(14), find the value of x such that f(x)=-10
B.) A math exam was linearly scaled so that the actualy low score of 30 became a 55 and the actual high score of 80 became 95. Express the scaled score as a function of the actual score (find equation); what's judy's scaled score if her actual score is 71?; if rob's scaled score is 89, what was his actual score?
C.) A car purchased in 1999 was $35,000. Now has a bluebook value of $12,000 in 2006. Assuming that the depreciation in the value occurs at a constant rate, construct a function that will give the value of the car as a function of years since its purchase. Also, how many yrs did it take for the car to depriciate to a value of $20,000? What will the value of the car be in 2008?
2006-10-05 10:46:33 · 5 answers · asked by sunny_cherries2323 1 in Education & Reference ➔ Homework Help
A) Make two ordered pairs (2,1) and (-2,5). Find the slope between them: (y2-y1)/(x2-x1). Use the slope and one point to find the equation of the line (y-y1)=m(x-x1). Then substitute -10 for y and find x.
B) and C) are the same problem with different numbers.
2006-10-05 11:01:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A)
f(x) = -x + 3
f(9) = -6, f(14) = -11
f(13) = -10
2006-10-05 17:48:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
These are very easy questions and before I would answer I suggest you look at yopur Algebra book . TYhen if you still cant Ill help you.
2006-10-05 17:52:14 · answer #3 · answered by ariermagee 2 · 0⤊ 0⤋
OMG!!!! I NEED to go back to school. I hope my kids don't come home with THIS homework.
2006-10-05 17:49:09 · answer #4 · answered by amee2you 3 · 1⤊ 0⤋
Back in my day we did our own homework.
2006-10-05 17:54:53 · answer #5 · answered by desiderio 5 · 0⤊ 0⤋