y = mx + b vocabulary

Which is a y intercept? ( 6, 10), (2, 0 ) or (0,4)

(0, 4)

y-intercept (also known as "b" in y = mx + b)

* starting point * constant * one-time fee: entry fee, service charge, starting balance, set up fee

What is the y-intercept of a line that passes through the points (10,0) and (0, -3)?

-3

What is the slope of the line that passes through (2,4) and (6, 12)?

2

What is the slope of a line that passes through the points (-2,-6) and (2,6)?

3

What is the y-intercept of a line that passes through the points (0,4) and (-6,0)?

4

When the slope is negative, the line goes ____ from left to right.

Down

The "x-axis" is the line on a coordinate grid that goes _______.

Left to right

When the slope is positive, the line goes _____ from left to right.

Up

The "y-axis" is the line on a coordinate grid that goes ________.

Up and down

y-intercept on a graph

Where the line crosses the y axis x = 0 (0, Y)

Given a slope of -3 and a y-intercept of 2, write an equation of the line.

Y=-3x+2

rate (m or slope) from a story sentence

amount per item or each $15 each, $20 per hour

y-intercept from a table

at ordered pair (0,b), point where x = 0

y- intercept in an equation

b in y = mx + b

In y=mx+b, what letter represents the slope?

m

m (slope) from y= mx + b

rate of change slope rise over run

What does "rise over run" refer to? What does "change in y over change in x refer to?

slope

slope of a VERTICAL line

undefined

What is the point at which the graphed line crosses the y-axis called?

y-intercept

Given a slope of 2 and a y-intercept of -3, write the equation of the line.

y=2x-3

Equation for a line

y=mx+b

slope of a HORIZONTAL line

zero