Chapter 4.4, Problem 7E

a.

To determine

The price of laptop with a hard-drive capacity of $8$ gigabytes.

Answer to Problem 7E

Price is $\$1100$ .

Explanation of Solution

Given Information: A graph with marked points.

Calculation:

Drawing a vertical line from where $x=8$ . It meets a marked point, examining its magnitude on $y-axis$ . The magnitude is $1100$ .

  $\therefore$ Price is $\$1100$ .

b.

To determine

To find: Hard-drive capacity of $\$1200$ laptop.

Answer to Problem 7E

Capacity is $12gigabytes$ .

Explanation of Solution

Given information: Graph with marked points.

Drawing a vertical line from where $y=1200$ . It meets horizontal axis at $12$

  $\therefore$ Capacity is $12gigabytes$ .

c.

To determine

To find: The trend of price with respect to capacity.

Answer to Problem 7E

As the capacity increases, price increases.

Explanation of Solution

Given information: Graph with marked points.

As we move along the horizontal axis the marked points head higher and higher.

The marked points are making an uphill from left to right.

  $\therefore$ As the capacity increases, price increases.