() braden bought 18 pencils for $4.50. let x represent the number of pencils purchased, and let y represent the total cost. graph the line that represents the proportional relationship. ( tell me what points i should plot! will mark ! )

You should plot the points (0, 0) and (18, 4.50)

We know that zero pencils cost zero dollars, so our first point is (0, 0). We also know that 18 pencils cost 4.50; since is the number of pencils and the cost, our second point is (18, 4.50).

Now let's find the equation and the graph of our line. But first, we are going to find the slope of our line using the slope formula:

where  

is the slope of the line

are the coordinates of the first point on the line

are the coordinates of the second point

From our points we can infer that ,  ,  ,  and  , so let's replace the values in our slope formula:

The slope of  our line means that each pencils costs $0.25 by the way.

Now that we have the slope of our line, we can use the point slope formula to complete our line equation:

We can conclude that we should plot the points (0, 0) and (18, 4.50) to graph the line as shown in the picture.

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: