For 3 & 4, to find the slope, use y2 - y1 divided by x2 - x1.
Let one point be (x1, y1) and the other (x2, y2).
Then, choose one of the two points to use for y - y1 = m(x - x1).
For 2, follow the same format as 1.
8: 2/3
8 divided by 2/3
Skip, change, & flip.
8 * 3/2 (see what changed from 8 divided by 2/3 to this?)
24 / 2
12 / 1
Convert back to ratio form:
12:1.
Simply multiply 1*1 / 2*3
= 1/6.
Can you post them as 1) 2) 3) 4) rather than all of them in just one line.
Visit: http://web2.0calc.com/questions/how-do-i-type-in-fractions
I believe you mean as a fraction.
For the cube root of a if a = 216:
Find a number such that a*a*a = 216.
You do the vertical line test. Look at the graph to see if for an x-value, there are multiple y's associated with it.
See: http://www.regentsprep.org/regents/math/algebra/ap3/lfunction.htm
Do you mean like delta x? That means a change in two values, for example, to find the slope we can say delta y / delta x instead of y2 - y1 divided by x2 - x1.
2/3 : 8
2/3 / 8
Skip, change, & flip
2/3 * 1/8
2 / 24
1/12.