Question

Juan always saves the same amount from his weekly allowance. The table shows how much he has saved at different times.

How much will Juan have saved in 14 wk?



$




Juan’s Savings


Weeks
3 6 9 12
Amount saved 19 28 37 46

Answer 1

he will have saved 52 

Answer 2

y = ax + b
the difference in numbers is 9 and the difference in weeks is 3 so
a = 9/3 = 3
b = 19 - 9 = 10

the equation is
y = 3x + 10

sub 14 into equation as x
y = (14 x 3) + 10
y = 42 + 10
y = $52