Equations from Graphs Slope Intercept Form

What is Slope-Intercept Form of linear equations?

• Ax+By=C

• y=mx+b

• y-y1=m(x-x1)

• m = (y2-y1)/(x2-x1)

The y-intercept is the point where a line crosses the ___________.

• x-axis

• origin

• y-axis

• x-intercept

What is the slope in y=mx+b

• y

• m

• x

• b

What is the y-intercept in y=mx+b

• y

• m

• x

• b

In slope-intercept form, what does the m represent?

( y = mx + b)

• mountains

• Slope

• y-intercept

• mixed up

Answer explanation

We often think of m (slope) telling us how to "move" on the line! Rise over run!

In slope-intercept form, what does the b represent?

( y = mx + b)

• blah blah blah

• bend in the graph

• y-intercept

• slope

Answer explanation

We often think of b (y-intercept) telling us whter the graph "begins" on the y-axis! The value of y when x =0!

What is the slope of the line? (pay attention to the direction of the slope or in what direction you move for the sign of the slope!)

• -2

• 2

• -1

• 1

Why do we want to think of slope as a fraction?

• rise/run or change in y over change in x

• run/rise or change in x over change in y

• Fractions make things better

• Because running makes the problem go faster!

What is the slope of the line?

• Undefined

• 0

• 1

• -1

When graphing from slope-intercept form ( y = mx +b), first you graph the ______ value on the ________________.

• m value on the y-axis

• m value on the x-axis

• b value on the y-axis

• b value on the x-axis