# straight line graphs, think it's in wrong category oh well

help?

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#### Subhotosh Khan

##### Super Moderator
Staff member
• topsquark

#### Dr.Peterson

##### Elite Member
Specifically, we'll want to know what help you need, as well as what particular topic is being tested here.

Have you learned about the slope-intercept form, which is the way these equations are written; or are you just learning how to plot points? Do you have any examples or instructions to follow?

#### HallsofIvy

##### Elite Member
You might remember, from geometry, that "a line is determined by two points". For example, if y= 4x- 3 (probably not one of those you gave, I can't read them very well) then, when x= 0, y= 4(0)- 3= -3 so (0, -3) is a point on the line. Mark (0, -3) on the graph paper. When x= 4, y= 4(4)- 3= 13 so (4, 13) is a point on the line. Mark (4, 13) on the graph paper. Then use a straight edge to draw the line through those two points.

#### Jomo

##### Elite Member
y=2x+1
Pick 2 or more x values, double each then add 1 and call the results y-values. Now plot these points and connect the dots.