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What are the black dots that surround a graph?
Its call the grid its used so the points you make are more accurate
Is it possible for the graph of a function to have more than one x-intercept?
Yes. (e.g y=x2-1.)
What does it mean if the y intercept of x equals 2?
This would be a more meaningful statement if it said that the y intercept of the equation equals 2, which would mean that when you draw the equation on a graph, the line intersects the y axis at 2, or in other words, when x = 0, y = 2. However, as stated, x = 2 has no y intercept. If you graph it, that is just a verticle line located at 2 on the x axis.
What are some reasons that you might have a nonzero y-intercept on a graph?
For any relationship between x and y, the value of y at x=0 (the y intercept) could be anything depending on what the relationship is. What was your weight when you were born? There are infinitely more relationships that are nonzero when x=0, than are zero.
How can a graph make it appear that the data vary more than they actually do?
make the intervals really small.
