Point-Slope Worksheet (Page 3 of 3) in pdf

Point-Slope Worksheet Page 3

Let’s try another one:

PHOTO PRINTING. The table shows the cost of ordering sets of prints of digital photos

from an online service. The cost per print is the same for the first 30 prints. There is also

a shipping charge.

Number of Prints

Total Cost ($)

1.98 2.47 3.94 5.41

•

Calculate the slope from any two points:

•

Use the slope and a point to write the equation in point-slope form:

•

Distribute and write the equation in slope-intercept form:

•

One-time fees are the y-intercept. The shipping charge was __________________.

•

Recurring fees are the slope. The cost per print is __________________.

Now try this one on your own:

MARATHON. The table below shows a marathon runner’s speed at several outdoor

temperatures.

Temperature (°F)

Running Speed (ft/s) 16.7 17.0 17.3 17.6

(a) Calculate the slope from the table.

(b) Write an equation in point-slope form that relates running speed (y) to

temperature (x).

Point-Slope Worksheet Page 3