1) the data in the table below represents the pressure of the gas as the temperature changes. plot a graph of the data, using the space below. draw a trend line and calculate its slope. how are the variables related? what will he pressure of the gas be at 0c?

the graph looks like this
temperature pressure
10 723
25 763
40 800
55 845
80 900

The pressure of the gas 0°C is about 699.

Step-by-step explanation:

The given table of values is

Temperature      Pressure

     10                      723

     25                     763

     40                     800

     55                     845

     80                      900

The general form of a trend line is

where, b is slope and a is y-intercept.

Using graphing calculator, we get

The equation of line of best bit is

where, y is pressure at x°C.

We need to find the pressure of the gas at 0°C.

Substitute x=0 in the above equation.

Therefore the pressure of the gas 0°C is about 699.

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24