1. Graph the equation y = 4x − 3 and find the y-intercept.
2. What is the y-intercept of the graph shown below?
3. Think About the Process
a. Before graphing, describe where on the graph of the line y = x − 2 the y-intercept will be located.
A. The y-intercept will be located where the x-value is 1.
B. The y-intercept will be located where the graph crosses the y-axis.
C. The y-intercept will be located where the graph crosses the x-axis.
D. The y-intercept will be located where the x-value is −1.
b. Graph the equation.
c. What is the y-intercept of the graph of the equation?
4. The line in the graph models the growth of a plant in the past 10 years.
a. What is the y-intercept of the line?
b. What does the y-intercept represent?
A. The height of the plant 10 years ago
B. The growth of the plant each year
C. The tallest the plant will grow
D. How many years ago the plant was planted
c. How many years ago did the plant start to grow?
5. Think About the Process
a. How does the slope affect the graph of a line?
A. The slope affects where the line ends.
B. The slope affects the steepness of the line.
C. The slope affects where the line starts.
D. The slope affects where the line will cross the y-axis.
b. Graph the equation y equals , 2 thirds , x minus 4 and identify the y-intercept.
6. Error Analysis Jamal's notes say to let x = 0 and solve for y to find the y-intercept of an equation. He incorrectly says the y-intercept of this equation is −3.
a. Graph the equation y = x + 3.
b. Find the y-intercept using Jamal's method.
c. Which mistake might Jamal have made?
A. He let x = 1 and solved for y.
B. He let y = 0 and solved for x.
C. He let y = 1 and solved for x.
D. He let x = 0 and solved for y.