PLS HELP I NEED TO TURN IT IN AT 11am and ITS 8am Are they parallel or perpendicular? 1. y=2x+7 and y=-1/2x-4
2. 3x-2y=5 and 6y-9x=6
3. y= 3x+1/4 and y=3x+2

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect