Question

The following scatterplot shows the different amounts a babysitter charges, based on the number of hours that she babysits. Which equation best models the babysitter's charges, where x is the time of the babysitting (in hours) and y is the amount that the babysitter charges (in dollars)?
A. y = 6x + 10
B. y = 16x
C. y = 10x + 6
D. y = 8x

Answer 1

@jim_thompson5910
@ganeshie8
@phi
@zepdrix
@thomaster
@aaronq
@Luigi0210
@mathmale
@MathLegend
@jigglypuff314
@tHe_FiZiCx99
@Kainui
@iPwnBunnies

Answer 2

using the first and last points
(1, 16) and (5, 40)
find the slope
then back track and find the y-intercept
from there you can get an equation
y = mx + b
where m = slope and b = y-intercept

Answer 3

How do I find the slope?

Answer 4

\[slope = \frac{ rise }{ run } = \frac{ y _{2}-y _{1} }{ x _{2}-x _{1} } \]when given points (x1, y1) and (x2, y2)

Answer 5

(4,24)
@jigglypuff314

Answer 6

close :)
24 divided by 4 = slope

Answer 7

6=slope?

Answer 8

@jigglypuff314

Answer 9

yes :)
then back tracking
y-intercept is when x = 0
when x=1, y=16
so when x=0, y =(16-6) = ?

Answer 10

16-6=10

Answer 11

A or C?

Answer 12

y = mx + b
where m = slope and b = y-intercept

Answer 13

A?

Answer 14

yep :)

Answer 15

Thanks! :)