SOLUTION: Hello. I have to graph the equation f(x) = 0.15x - 28. I am completly lost. I also need to find the slope and y intercept.please help. thank you

Algebra ->  Linear-equations -> SOLUTION: Hello. I have to graph the equation f(x) = 0.15x - 28. I am completly lost. I also need to find the slope and y intercept.please help. thank you      Log On


   

Question 520151: Hello. I have to graph the equation f(x) = 0.15x - 28. I am completly lost. I also need to find the slope and y intercept.please help. thank you
Found 2 solutions by jessica43, Tatiana_Stebko:
Answer by jessica43(140) About Me  (Show Source):
You can put this solution on YOUR website!
Let's start by finding the slope and y-intercept. To easily find both of these, you want your equation to be written in the basic graphing formula:
y = mx + b (where m = the slope and b = y-intercept)
Your formula is already written in this formula:
f(x) = 0.15x - 28
So in this problem, m = 0.15 and b = -28. Therefore your slope is 0.15 and the y-intercept is -28.
To graph this, you know that the y-intercept (the point where x=0) is at -28. So one of your points on the line is (0,-28). From there, using the slope, you move up the y-axis 0.15 every time you move over 1 on the x-axis. The graph is as follows:
+graph%28+300%2C+200%2C+-20%2C+20%2C+-50%2C+0%2C+0.15x-28%29+

Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
The slope-intercept form of the equation is y=mx%2Bb, where m is the slope, b is y-intercept
f%28x%29+=+0.15x+-+28, so y+=+0.15x+-+28
m=0.15 - the slope
b=-28, then (0,-28) is y-intercept
+graph%28+300%2C+300%2C+-5%2C+25%2C+-35%2C+5%2C+0.15x-28%29+