Procedure: Draw a straight vertical line on a piece of paper that is about 8 inches long. This is designated as the Y axis. Typically the dependent variable is represented on the y axis. Draw a straight horizontal line to the right that starts from the bottom of the vertical line. This is designated as the X axis. Typically the independent variable is represented on the x axis. Label the x axis blood volume & the y axis blood pressure Mark equidistant points on each axis ½ inch apart. On the x axis, label the first mark 200, the second 400, & so on up to the maximum of 2,600. On the y axis, label the first mark 10, the second 20, & so on up to the maximum of 130. Data Table: Blood Volume(x value) Blood Pressure(y value) 200 10 600 30 1,000 50 1,400 70 1,800 90 2,200 110 2,600 130 Now mark a point on your graph for each pair of data values from the table. The first value, 200, represents the x & the second value, 10, represents the y. To locate the point, move along the x axis until you hit 200, then move vertically from there to where you intersect a straight horizontal line over from the 10. Mark this point. Do the same for the other data values. Connect all the points. What do you see?
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Procedure:
Draw a straight vertical line on a piece of paper that is about 8 inches
long. This is designated as the Y axis. Typically the dependent
variable is represented on the y axis.
Draw a straight horizontal line to the right that starts from the bottom
of the vertical line. This is designated as the X axis. Typically
the independent variable is represented on the x axis.
Label the x axis blood volume & the y axis blood pressure
Mark equidistant points on each axis ½ inch apart. On the x axis, label
the first mark 200, the second 400, & so on up to the maximum
of 2,600. On the y axis, label the first mark 10, the second 20, &
so on up to the maximum of 130.
Data Table: Blood Volume(x value) Blood Pressure(y value)
200 10
600 30
1,000 50
1,400 70
1,800 90
2,200 110
2,600 130
Now mark a point on your graph for each pair of data values from the table. The first value, 200, represents the x & the second value, 10, represents the y. To locate the point, move along the x axis until you hit 200, then move vertically from there to where you intersect a straight horizontal line over from the 10. Mark this point. Do the same for the other data values.
Connect all the points. What do you see?
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