Question

Hi, so can someone please check my answers. I'm terrified of what I'm gonna get and I'm already failing math so please help me.

1. The function j(x)=39x represents the number of jumping jacks j(x) you can do in x minutes. How many jumping jacks can you do in five minutes?
A. 195 Jumping Jacks*****
B. 7 Jumping Jacks
C. 144 Jumping Jacks
D. 234 Jumping Jacks

2. Use the vertical line test to determine whether the relation graphed below is a function
A. yes****
B. no
C. Not determined

Please help

Answer 1

I will medal anyone who comments with the answer of explaining it to me

Answer 2

the * is what you think the answer is?