Question

graph y=7x

Answer 1

when x = 1, what is the value of y?

Answer 2

any ideas jewels64?

Answer 3

\[y=mx+b\]This is the basic linear graphing formula. In your example, "7" is the "m"; there is no "b" value given (which means it is 0). The "m" represents the slope of a line. The slope is shown as rise over run.
\[\frac{ rise }{ run }\]
For your example, 7x, we can look at 7 as a whole number -- which is essentially that number over 1, like so.
\[\frac{ 7 }{ 1 }\]
This means that the line will RISE (move up) seven points and will RUN (move to the right) one point. The "+b" portion of the "y=mx+b" equation refers to the y-intercept. This is a point that happens when x is equal to 0. (To find this out algebraically, let x equal zero in your y= equation and solve for y.)
However, since there is no b value given, we can assume that the Y intercept is 0. Start with the plot point (0,0) and apply the slope to find the next plot points.