Linear Equation Real World

A strong cold front blew through during the night.  The temperature outside began to drop rapidly.  The graph shows the temperature at each hour after the cold front blew through.  What is the rate of change of the graph?

• 2.5°F per hour

• 0.2°F per hour

• -0.2°F per hour

• -2.5°F per hour

In the equation y=mx+b, what does the m represent?

• slope

• y-intercept

• linear

• point-slope

What is the slope in the equation y=2x + 3?

• 2

• 3

• 5

• Cannot be Determined 

What is the y-intercept in the equation
y= -2x + 5

• -2

• 3

• 5

• Cannot be Determined

What is the y-intercept for the given graph?

• -5

• 5

• 1

• -1

Which equation has the greatest rate of change (slope)?

• y = 5x + 2

• y = -5x + 9

• y = 10x + 1

• y = -2x + 15

Find the slope of the line.

• 1/2

• -1/2

• 2

• -2

After paying $5.12 for a salad, Kamauri has $27.10. How much money did he have before buying the salad?

• n + $5.12 = $27.10

• n - $5.12 = $27.10

• n - $5.12 = -$27.10

• $5.12 - n = $27.10

Which equation would describe "two times a number plus five equals 15"?

• x + 5 = 15

• 2x + 5=15

• x + 2(5) = 15

• 2(x + 5) = 15

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5

• Subtract 5

• Multiply by 7

• Subtract 7