Grade 8 STAAR reference chart

In the slope-intercept form equation

 $y=mx+b$  

what letter denotes the slope?

• y

• m

• x

• b

In the slope-intercept form equation

 $y=mx+b$  

what letter denotes the y-intercept?

• y

• m

• x

• b

In the direct variation equation

 $y=kx$  

what letter denotes the constant of variation?

• y

• k

• x

• impossible to tell

Given the direct variation equation

 $y=kx$  

how do you find the constant of variation?

• divide y by x

• multiply y by x

• divide x by y

• multiply x by y

How do you find the slope of a line from a graph or table?

(multiple answers are possible)

•  $\frac{y_2-y_1}{x_2-x_1}$  

•  $\frac{Rise}{Run}$  

•  $Look\ for\ x=0\ in\ the\ table$  

•  $Look\ for\ the\ point\ where\ the\ line\ hits\ the\ y-axis$  

How do you find the y-intercept of a line from a graph or table?

(multiple answers are possible)

•  $\frac{y_2-y_1}{x_2-x_1}$  

•  $\frac{Rise}{Run}$  

•  $Look\ for\ x=0\ in\ the\ table$  

•  $Look\ for\ the\ point\ where\ the\ line\ hits\ the\ y-axis$  

How are radius and diameter related?

Multiple answers are possible)

• d=r/2

• r=d/2

• r=2d

• d=2r

How do you find the Circumference of a circle?

(Multiple answers are possible)

• $A=\pi r^2$

• $C=2\pi r$

• $C=\pi d$

• Didn't have time to find the answer.

How do you find the Area of a Triangle?

(Multiple answers are possible)

•  $A=\frac{1}{2}bh$ 

•  $A=\frac{bh}{2}$ 

•  $A=0.5bh$ 

• Didn't have time to find the answer.

How do you find the Area of a Rectangle?

(Multiple answers are possible)

•  $A=\frac{1}{2}bh$ 

•  $A=bh$ 

•  $A=\frac{1}{2}\left(b_1+b_2\right)h$ 

•  $A=\pi r^2$