Final answer:
Latoya offers the less expensive unit rate for the magazine at $2.625 per issue, compared to Al's rate of $3 per issue.
Step-by-step explanation:
To determine who offers the less expensive unit rate for the magazine subscription between Al and Latoya, we need to calculate the cost per issue for each subscription offer. For Al, the cost per issue is $15 divided by 5 issues, which is $3 per issue. For Latoya, the cost per issue is $21 divided by 8 issues, which equals $2.625 per issue.
So, comparing the two unit rates, we can see that Latoya's rate of $2.625 per issue is less expensive than Al's rate of $3 per issue. Therefore, Latoya offers the less expensive unit rate for the magazine subscription.