Algebra

Question 1

Basic tips

Answer 1

Read carefully, make sure you use all information they give you, just make sure it’s relevant.

Question 2

Equation of a line

Answer 2

y = mx + b (all constants need to be same units)

f(x) - miles
m - miles/year
x - year
b - miles

Question 3

If they ask, “In what year”

Answer 3

Round up to an integer and put it as 2001 or 1997, etc.

Question 4

What happens to the graph when the starting point is not 0

Answer 4

There’s a horizontal shift

Question 5

Percent

Answer 5

An amount per 100
Divide by 100 to get decimal
“of” means multiply

Question 6

How to find %

Answer 6

Let b = original value

b - .09b
b(1 -.09)
.91b

Question 7

Tip - units

Answer 7

Always check that they make sense and are the same throughout.

Question 8

What does solution mean

Answer 8

Point of intersection (1 solution for lines)

Question 9

How many solutions do parallel lines have

What makes a line parallel

Answer 9

No solutions

Same slope, different y-int

Question 10

How many solutions do the same lines have

How do you know

Answer 10

Infinite solutions

Same m and b - mx + b form

Question 11

Tip for solving for a variable

Answer 11

Don’t focus on the other unknowns, just what you need to find