# Graph y=1.5x-7.5 y=1.5x-7.5
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=1.5
b=-7.5
The slope of the line is the value of m, and the y-intercept is the value of b.
Slope: 1.5
y-intercept: -7.5
Slope: 1.5
y-intercept: -7.5
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 3 to substitute in for x to find the ordered pair.
Replace the variable x with 3 in the expression.
f(3)=1.5(3)-7.5
Simplify the result.
Multiply 1.5 by 3.
f(3)=4.5-7.5
Subtract 7.5 from 4.5.
f(3)=-3
The final answer is -3.
-3
-3
The y value at x=3 is -3.
y=-3
y=-3
Choose 2 to substitute in for x to find the ordered pair.
Replace the variable x with 2 in the expression.
f(2)=1.5(2)-7.5
Simplify the result.
Multiply 1.5 by 2.
f(2)=3-7.5
Subtract 7.5 from 3.
f(2)=-4.5
The final answer is -4.5.
-4.5
-4.5
The y value at x=2 is -4.5.
y=-4.5
y=-4.5
Create a table of the x and y values.
xy2-4.53-3
xy2-4.53-3
Graph the line using the slope and the y-intercept, or the points.
Slope: 1.5
y-intercept: -7.5
xy2-4.53-3
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