francis has to prove that a linear function grows by equal differences over equal intervals by using the graph below and the slope-intercept equation, y=mx+b. What is the missing step in the proof?
1. If x1,=a, then y,=ma+b by substituting a into the slope intercept equation.
2. If x2=a+d, then y2=ma+md+bby substituting (a+d) into the slope intercept equation.
3. (triangle)y= y2-y1=__________ by the subtraction property of equality.
4.(triangle)x=x2-x1=(a+d)-a=d by the subtraction of property of equality.
5. using the slope formula, (triangle)y/(triangle)x=y2-y1/x2-x1=md/d=m

Question

francis has to prove that a linear function grows by equal differences over equal intervals by using the graph below and the slope-intercept equation, y=mx+b. What is the missing step in the proof? 
1. If x1,=a, then y,=ma+b by substituting a into the slope intercept equation.
2. If x2=a+d, then y2=ma+md+bby substituting (a+d) into the slope intercept equation.
3. (triangle)y= y2-y1=__________ by the subtraction property of equality.
4.(triangle)x=x2-x1=(a+d)-a=d by the subtraction of property of equality.
5. using the slope formula, (triangle)y/(triangle)x=y2-y1/x2-x1=md/d=m

mera8421 · Answer

A (ma+md+mb)-(ma+b)
B (ma+md+b)-(ma+b)
C(ma+md+b)-(ma-b)
D y2=m(a+d+b)

mera8421 · Answer

HELP

holsteremission · Answer

If $y_2=ma+md+b$ and $y_1=ma+b$, then $y_2-y_1=(ma+md+b)-(ma+b)=md$.