Irunt
amanda only has $30 to buy pens and notebooks. each pen costs $2. each
notebook costs $3. which of the following graphs represents the possible
combinations of pens and notebooks that she may purchase?

30 = 2x + 3y

Step-by-step explanation:

x is the number of pens bought and y is the number of notbooks bought you graph this and you get a graph that shows you all the combinations.

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.