Before calculus

Read a point on a graph

Every point has two coordinates: x is its horizontal position and y its vertical position. Move the point and follow the dashed lines to the axes.

1. Positive coordinates

1 / 3
Example graph
f(x) = 2x + 1
-224-4-22468xy

Move the point and follow its guides to read both coordinates. The question keeps its stated x value, even when you move the point.

x
1
y
3

Press Enter to check your answer.

Follow the vertical guide to the x-axis and the horizontal guide to the y-axis. The moving point always lies on the line y = 2x + 1.

2. On the vertical axis

2 / 3
Example graph
f(x) = 2x + 1
-224-4-22468xy

Move the point and follow its guides to read both coordinates. The question keeps its stated x value, even when you move the point.

x
1
y
3

Press Enter to check your answer.

Follow the vertical guide to the x-axis and the horizontal guide to the y-axis. The moving point always lies on the line y = 2x + 1.

3. Negative coordinates

3 / 3
Example graph
f(x) = 2x + 1
-224-4-22468xy

Move the point and follow its guides to read both coordinates. The question keeps its stated x value, even when you move the point.

x
1
y
3

Press Enter to check your answer.

Follow the vertical guide to the x-axis and the horizontal guide to the y-axis. The moving point always lies on the line y = 2x + 1.