# Graph y=4x-2.5 y=4x-2.5
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=4
b=-2.5
The slope of the line is the value of m, and the y-intercept is the value of b.
Slope: 4
y-intercept: -2.5
Slope: 4
y-intercept: -2.5
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 1 to substitute in for x to find the ordered pair.
Replace the variable x with 1 in the expression.
f(1)=4(1)-2.5
Simplify the result.
Multiply 4 by 1.
f(1)=4-2.5
Subtract 2.5 from 4.
f(1)=1.5
The final answer is 1.5.
1.5
1.5
The y value at x=1 is 1.5.
y=1.5
y=1.5
Choose 0 to substitute in for x to find the ordered pair.
Replace the variable x with 0 in the expression.
f(0)=4(0)-2.5
Simplify the result.
Multiply 4 by 0.
f(0)=0-2.5
Subtract 2.5 from 0.
f(0)=-2.5
The final answer is -2.5.
-2.5
-2.5
The y value at x=0 is -2.5.
y=-2.5
y=-2.5
Create a table of the x and y values.
xy0-2.511.5
xy0-2.511.5
Graph the line using the slope and the y-intercept, or the points.
Slope: 4
y-intercept: -2.5
xy0-2.511.5
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