Question

Calib received $50 for his birthday and put it in his piggy bank. Each week, he puts 2 more dollars in his bank. The amount of money in dollars D in his bank is given by D = 2w + 50, where w is the number of weeks he has saved 2 dollars. His sister Lara makes a table of reasonable values for w. Lara selects 14 as a value for w.

What is the corresponding table entry for D?


264


78


66


57

Answer 1

78


14 times 2 equals 28 and 50+28 equals 78

Answer 2

D = 2w + 50

Plug in 14 for w.

D = 2(14) + 50

D = 28 + 50

D = 78

Therefore the corresponding table entry for D would be B. 78