STAAR Review Linear Relationships

What is the slope of this equation? 
y = 3x - 4 

Mathematical Equivalence

ON

What is the y-intercept of this equation? 
y = 5x + 8 

• (0, 5)

• (5, 0) 

• (0, 8) 

• (8, 0) 

Answer explanation

The y-intercept of 8 is located on the y-axis which is at a coordinate pair location of (0,8).

Write the linear equation of the table.

y=​ (a)   x+​ (b)  

• 3
• 0
• 1/3
• 1/2
• 1

Answer explanation

The change in the y-values is +3 and the change in the x-values is +1 so the slope is 3/1 or just 3.

Then you find the y-intercept at the coordinate pair where x is 0, the y-value is 0 so the y-intercept is +0.

Write an equation for this situation.

Answer explanation

$19.25 per day means you multiply 19.25 by x number of days.

Which table contains only values that satisfy the equation

y = 0.5x + 14?

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What is the equation for this line?

Mathematical Equivalence

ON

Write the equation for the line. (a)  

• y= -1x+3
• y= 4x+3
• y=1/4x+3
• y= -4x+3

Which equation matches the table?

Mathematical Equivalence

ON

Answer explanation

The change in the y-values is +1 and the change in the x-values is +1 so the slope is 1/1 or just 1.

When you have a slope of 1 you don't need to write the coefficient of 1 in front of the x because 1x is just x.

Then you find the y-intercept at the coordinate pair where x is 0, the y-value is 5 so the y-intercept is +5.

The table shows the relationship between y, the cost to rent a boat, and x, the amount of time the boat is rented. Which graph best represents the relationship between x and y shown in the table? (7.7A)

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Determine the missing value in the table.

Mathematical Equivalence

ON