In Texas the state sales tax rate is 6%. If
Lisa purchases a refrigerator at
$420.00, then how much will she pay in
sales tax?

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.

not sure but it may be b, as i said i'm not sure.