Question

I need help on the question in the picture attached. i tried posting it but no one is answering it and this was due last week. please help fast

Answer 1

Yes

Explanation:

To find our whether Marrissa's budget will be enough for the party, we need to find the linear equation relating the cost and the number of guests. The linear equation is the form

`y=mx+b`

where y is the cost in dollars. m is the cost per guest, and b can be interpreted as additional charges for the party facility.

The cost per guest is given by the slope of cost vs. guest graph.

Let us pick two values (100, 1325) and (50, 725) and compute the slope:

`(\$1325-\$750)/(100-50)=\frac{\$12}{\text{guest}}`

With the value of slope m in hand, we now find b by using the values x = 100, y = 1325 (the choice of these values is arbitrary)

`\begin{gathered} 1325=12(100)+b \\ 1325=1200+b \\ \therefore b=125 \end{gathered}`

Hence, the equation relating the cost and the number of guests is

`y=12x+125`

Now, for 75 guests the cost will be

`\begin{gathered} y=12(75)+125 \\ y=\$1025.\text{ } \end{gathered}`

Therefore, Marrissa's budget, which is $1200, is greater than the cost of the party, meaning it will be enough.