Finding Slope and Y-Intercept from a Table

This video tutorial covers the concepts of slope and y-intercept, explaining how to find them using a table. It begins with an introduction to what slope and y-intercept are, followed by a detailed explanation of how to calculate the slope by selecting pairs of points and determining the change in x and y values. The tutorial then moves on to finding the y-intercept by identifying where x equals zero in a table. Finally, it demonstrates how to write the equation of a line in the form y = mx + b, using the calculated slope and y-intercept.

What does the slope of a line measure?

• The color of the line

• The length of the line

• The steepness of the line

• The point where the line crosses the x-axis

Tags

CCSS.8.EE.B.5

Where does the y-intercept occur on a graph?

• Where the line crosses the x-axis

• Where the line crosses the y-axis

• At the origin

• At the highest point of the line

What is the first step in finding the slope from a table?

• Multiply the x values

• Draw the graph

• Calculate the y-intercept

• Pick two pairs of x and y values

Tags

CCSS.8.EE.B.5

How do you calculate the change in x values?

• Add the x values

• Multiply the x values

• Divide the x values

• Subtract one x value from another

Tags

CCSS.8.F.B.4

CCSS.HSF.IF.B.6

What is the slope if the change in y is 12 and the change in x is 4?

• 12

• 48

• 4

• 3

Tags

CCSS.8.EE.B.5

How do you find the y-intercept if x=0 is not in the table?

• Guess the value

• Use the highest y value

• Use the slope to backtrack the pattern

• Ignore the y-intercept

Tags

CCSS.HSF.IF.B.4

What is the y-intercept if x=0 and y=5 in the table?

• 6

• 11

• 5

• 0

What is the general form of the equation of a line?

• y = mx + b

• y = x + b

• y = m + b

• y = mx

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

If the slope is 3 and the y-intercept is 5, what is the equation of the line?

• y = 3x + 5

• y = 5x - 3

• y = 5x + 3

• y = 3x - 5

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

What should you do if you get a negative value when subtracting for slope?

• Keep the negative sign

• Change it to positive

• Ignore the negative sign

• Add the values instead

Tags

CCSS.8.EE.B.5