Answer:
A- Fiona’s,
B- $6
B- Heidi’s
Step-by-step explanation:
Here, the equation that represents the value of Fiona’s coin, in dollars, x years later is,
f(x) = 3x + 12
Initially, x = 0,
Thus, the value of the coin when Fiona bought,
f(0) = 3(0) + 12 = $ 12,
Also, the graph represents the value of Heidi’s coin, in dollars, x years later.
By the graph, if x = 0 ( initially ),
y = 6
That is, when Heidi bought the coin its value is $ 6,
Also, 12 - 6 = 6
Hence, when they bought their coins, Fiona’s was worth $6 more than Heidi’s coin.