Q19. A pupil used a sensor to record the change in pH of 10 cm of an acid solution when an alkali solution was added a little at a time. The concentrations of the alkali and acid solutions were fixed.
His results are shown in the table below.
volume of alkali added (c pH of resulting mixt
0.0
5.0
2.0
5.0
5.0
6.0
5.5
8.0
6.0
7.0
120
8.0
8.5
16.0
90
90
200
Use his results to draw a graph on the grd below.
Label the axes.
Plot the points.
Draw a smooth curve.​

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality

The table below shows the function f. determine the value of f(3) that will lead to an average rate of change of 19 over the interval [3, 5]. a. 32 b. -32 c. 25 d. -25