Which table represents a linear function? x---y
0---1
1---2
2---4
3---8

x---y
0---0
1---1
2---3
3---6

x---y
0---0
1---1
2---0
3---1

x---y
0---1
1---3
2---5
3---7

If tana tanb=k, show that(1+k)cos(a+b)=(1-k)cos(a-b)

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).