Using y=mx+b
m stands for slope, b stands for y-intercept
slope is rise/run, the y-intercept is the point where the line touches the y-axis
1- y=(4/6)x+(-2)
2- y=(-2)x+(3)
Its -1 look how the chart flows
Answer:
15/25 can be simplified to 3/5.
Set it up as a ratio. $5.25/5 = $1.05 per notebook
Then solve your equation by multiplying the cost by 3. 3 * $1.05 = $3.15
The surface area is 46. Use 2(lw x lh x wh)