# Graph y=1/2x+7/2 y=12x+72
Use the slope-intercept form to find the slope and y-intercept.
The slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept.
y=mx+b
Find the values of m and b using the form y=mx+b.
m=12
b=72
The slope of the line is the value of m, and the y-intercept is the value of b.
Slope: 12
y-intercept: 72
Slope: 12
y-intercept: 72
Any line can be graphed using two points. Select two x values, and plug them into the equation to find the corresponding y values.
Choose 1 to substitute in for x to find the ordered pair.
Replace the variable x with 1 in the expression.
f(1)=12+72
Simplify the result.
Combine the numerators over the common denominator.
f(1)=1+72
f(1)=82
Divide 8 by 2.
f(1)=4
4
4
The y value at x=1 is 4.
y=4
y=4
Choose 3 to substitute in for x to find the ordered pair.
Replace the variable x with 3 in the expression.
f(3)=32+72
Simplify the result.
Combine the numerators over the common denominator.
f(3)=3+72
f(3)=102
Divide 10 by 2.
f(3)=5
5
5
The y value at x=3 is 5.
y=5
y=5
Create a table of the x and y values.
xy1435
xy1435
Graph the line using the slope and the y-intercept, or the points.
Slope: 12
y-intercept: 72
xy1435
Graph y=1/2x+7/2     