Question

A group of students must collect at least $120 to organize a science fair. They have already collected $30. Which graph best represents all remaining amounts of money, in dollars, that the students should still collect to organize the science fair?
Number line graph with closed circle on 120 and shading to the right

Number line graph with closed circle on 90 and shading to the right.

Number line graph with closed circle on 150 and shading to the right

Number line graph with closed circle on 30 and shading to the right.

Answer 1

Number line graph with closed circle on 30 and shading to the right
because you already have 30 dollars and they need at least 120 but if they get more then 120 they can still hold the science fair.

Answer 2

Answer:

The correct option is 2.

Step-by-step explanation:

It is given that a group of students must collect at least $120 to organize a science fair. They have already collected $30.  

Let the remaining amounts of money, in dollars, that the students should still collect to organize the science fair be x.

$x+30\geq 120$

Subtract 30 from both the sides.

$x+30-30\geq 120-30$

$x\geq 90$

It means the remaining amounts of money is greater than or equal to 90.

Therefore the number line graph with closed circle on 90 and shading to the right and option 2 is correct.